Catalyst for Windows
Installer (.msi)
Not out yetDownload
Get Catalyst.
One launcher for Windows and macOS. It runs Catalyst on Minecraft 1.7.10 to 26.3, with Sodium, Lithium, Dynamic FPS, FerriteCore, EntityCulling, ImmediatelyFast, MoreCulling, BadOptimizations and Iris already in where your version has them.
Catalyst for macOS
Disk image (.dmg)
Not out yetComing soon. The first public build of Catalyst isn't out yet. When it is, these buttons will download it - no account or other app needed.
What you need
System requirements.
ComputerWindows or macOS.
GameMinecraft: Java Edition 1.7.10 to 26.3 (38 releases: 26.1-26.3, 1.21-1.21.11 except 1.21.9, 1.20-1.20.6, 1.19-1.19.4, 1.18-1.18.2, 1.17-1.17.1, 1.16.4-1.16.5, 1.12.2, 1.8.9, 1.7.10), run with Fabric by the launcher.
AccountA Microsoft account that owns Minecraft: Java Edition. You sign in on Microsoft's own page - how sign-in works.
MemoryEnough to give the game 2 GB or more - you choose 2 to 16 GB in Settings.
JavaJava 21 or newer. The launcher finds one for you, or you can point it at yours.
InternetFor mods, updates, codes and the store. Nothing else needs to be installed.
Safe to install
What Catalyst does - and never does.
No cheats, everNothing in Catalyst changes your hitbox, reach, speed or anything in a fight. Cosmetics and emotes are only drawn, and an emote stops the moment you move, attack or get hit.
Your password stays with MicrosoftYou sign in on Microsoft's own page. Catalyst never sees your password - Mojang allowed the launcher to sign players in through Minecraft's own sign-in.
What we keepYour Minecraft name and id, coins, cosmetics, friends and what you wear - nothing is sold, and nothing about you is shared beyond what other players see. Privacy policy.
Check your downloadThe first builds aren't signed yet, so Windows and macOS warn on first open - signing comes with the first public release. Only download from this page, and compare the file's SHA-256 with the one below.
Allowed where clients areCatalyst only changes how things look and adds tools servers already allow, like FPS and keystroke displays. If a server bans every modified client, follow its rules.
Found a problem?Tell us through Need help on any page - security reports are read first and fixed before anything else.
Release notes
What's new.
The latest from the launcher's News page - real changes only.
Updates that install themselves, and more behind the pages
The launcher updates itself on Windows too, buttons are empty with the colour on their edge, the page you're on stands out of the side rail, and every scene behind the pages has more in it.
- Update now installs the new version and opens it again by itself, on Windows as on a Mac - no downloading it again. The test site needs no password any more.
- Blue buttons are empty now: dark glass with the colour in a ring round it and white letters - on the website too, Download first of all.
- The side rail has a ground of its own, and the page you're on stands out of it in a raised circle with a notch cut round it.
- Launch is glossier: lit from above, a glint in its corner and a darker foot, and its glow no longer blurs a layer every frame.
- Aurora is softer, with no veins: light flows along the ribbons, strands wave beside them, the curtains are wider and fainter, and a star shoots now and then.
- Horizon's blocks are smaller and its trees real oaks, with grass and flowers under them and a far blue range with snow on it - no line round each block any more.
- Graveyard has Minecraft's square moon, its seas a shade darker, and faint stars.
- Cyberpunk's veins are finer, with a current of light running along every one all the time, a far skyline and holograms over the blocks.
- The Nether's ceiling is finely stepped and speckled like netherrack, lava drips from it, a ghast drifts past, basalt pillars stand in the sea and soul fire burns blue on the cliff.
- The deep sea has coral on the reef, a wreck on the far bank, the light's caustics playing over it, a turtle and a third shoal.
- Settings is shaded over every backdrop so its rows read, and Your look in Owned stands on darker glass.
- The light theme shows a scene as a pale print, so the page stays light.
- Deleting your Catalyst account asks for a code we email you first.
- The daily reward cards wait for your account's answer instead of showing day 1 for a moment.
- The backdrop's clock runs at sixty steps a second on 120 Hz screens, so it costs the same there.
- The cape editor's Clear is Clear all.
A new look that moves
Buttons like an iPhone's that sink and spring back, tabs and the side rail that slide, brighter colours and rounder panels - and clans with codes drawn for you and badges in six shapes.
- Buttons like an iPhone's: capsules lit from above, bold white labels and a soft glow of their colour. Every button sinks a little as you press it and springs back.
- Things slide instead of switching: the pill under the showing tab glides to the next one, the light on the side rail moves from page to page, switches spring across, and pages rise into place as they open.
- Fields answer your typing: a ring of light round the one you're in, a little brighter with every key.
- Brighter colours: the ground is a deeper, more colourful navy instead of near-black, the backdrop is lit in two colours, its edges no longer sink to black, and panels have rounder corners.
- Three new scenes behind the pages: Cyberpunk - neon circuit veins round the edges with sparks racing along them, a night city and a grid floor - Nether and Deep sea. Aurora turns green and violet under the stars, with curtains of light rising off its ribbons and veins of light round the edges. Horizon now has birds, shooting stars and turning sun rays, Graveyard a crypt, a fence, lanterns, wisps and bats. A scene puts on its own colours, the Launch button too, and leaving it gives yours back.
- Counts sit on the same line as their words in every row of tabs - All 31, Sounds 2.
- Clans: your clan's code is drawn for you - five capitals and digits, like K7QX2 - so nobody can take every short tag. Names are 1 to 10 characters, one of a kind however they're written, and never a slur in any language.
- Clan badges in six shapes - shield, round, hexagon, diamond, banner and seal - lit in your clan's colour. The clan's owner can change the shape and the colour any time with Edit badge.
- The cape editor's tools are drawn as what they are - a pencil, an eraser, a bucket, an eyedropper - under a pill that slides to the one you pick, and brush sizes are dots.
- Skins shows your skin straight away and checks with Minecraft after, instead of making you wait.
- If your daily streak runs out, the totem pops as you open the Store - and says how long the streak was.
- Catalyst keeps what it downloads under 7 GB, clearing what was used longest ago first. Your worlds, screenshots, clips and settings are never touched.
Combo Counter and a capture key
Combo Counter shows how many hits you land in a row, and one key in the Right Shift menu takes a screenshot when you tap it and records a video while you hold it.
- Combo Counter, under PvP: every hit you land on a player or mob without being hit back counts up on your HUD. Being hit, or a few seconds without a hit, starts it again. Drag it anywhere in Edit HUD.
- Capture, under Misc: one key, like a phone's camera button - tap it for a screenshot, hold it to record a video for as long as you hold. Or set it to keep recording until you press it again.
- Videos go into the game's screenshots folder, beside your screenshots: an MP4 on a Mac, ready to send. A red dot and a timer show while it records.
- Both work on every Minecraft version Catalyst plays, 1.7.10 to 26.3.
Your worlds on every version
A world made in one Minecraft version shows in every other's world list, the Play page has each update's artwork, and two whole scenes can stand behind the pages.
- Worlds you make in one version show in the game's own Singleplayer list in every other version.
- The Play page is cards with each update's own artwork - Mojang's key art, and drawn tiles of each update's blocks for the oldest.
- Switch between Catalyst releases in Settings, and play offline with your name kept.
- The app updates itself.
- Two scenes behind the pages, picked on the Themes page: Horizon, a blocky land at sunset, and Graveyard, a grey night of leaning graves and bare trees - and a Sunset colour scheme to go with Horizon.
- Catalyst's own words in the game are in German, Russian and Japanese too.
- Escape opens the game's own pause menu again; Catalyst's pause menu is a switch in the Title Screen settings.
- Delete your Catalyst account from Settings, whenever you like.
Catalyst plays 38 Minecraft releases
Catalyst now plays 38 Minecraft releases, from 1.7.10 to 26.3 - every module, cosmetic, friend and clan on all of them, in the same look.
- 26.1 to 26.3, every 1.21 release, 1.20 to 1.20.6, 1.19 to 1.19.4, 1.18 to 1.18.2, 1.17 and 1.17.1, and 1.16.4 and 1.16.5. 1.21.9 plays as plain Minecraft: its last Fabric API lacks what Catalyst draws the world with.
- And the PvP classics on Legacy Fabric: 1.12.2, 1.8.9 and 1.7.10, with every module, the cosmetics and emotes, friends and clans, and the Catalyst title screen - sharp on a Retina screen.
- The same Right Shift menu, HUD and settings on every one, and your profiles read the same everywhere.
- Each version brings its own preinstalled mods - Sodium, Iris and the rest - fitted to work together, and the Mods page installs only what runs on it.
- Every other Minecraft version plays too, back to 1.0, as plain Minecraft from Mojang.
Draw a cape, presents that open
Draw your own cape in the Store's Capes tab and wear it or send it in, daily presents that shake and open, and a streak that runs on from month to month.
- The Store's Capes tab: paint the back of a cape, wear it yourself straight away, or send it to Catalyst Designs, where a person checks it and players vote.
- Daily presents shake, their lids pop off and the light pours out - and a lucky day is the lucky block.
- Your daily streak runs on from one month into the next.
- A Notifications panel under the bell: chat, friend requests, clan invites, today's present and the news in one place.
Host for Friends and new waypoints
Open your world to friends from the pause menu in one click, waypoints redone like Lunar's with a Clan Waypoints module, a minimap in Xaero's style and stickers in chat.
- Host for Friends: one click in the pause menu opens your world to your Catalyst friends anywhere - they see Join beside your name.
- Waypoints redone: beams and labels, a list and an editor - and Clan Waypoints shows the ones your clan shares on each server.
- The Minimap in the style of Xaero's: real block colours, hills lit from the north, see-through water and N/E/S/W round its frame.
- Chat Stickers: type :) <3 :fire: and more, and see them as pictures in chat.
- Servers can switch a module off for their players instead of banning them for it.
- A new logo: the crystal C round a block.
Real shaders and 500+ FPS
Catalyst Shaders is now a real shader pack - shadows, clouds, reflections, Nether smoke and a black hole in the End - and the frame cap comes off for 500+ FPS.
- Catalyst Shaders is now a real shader pack: shadows from the sun and the moon, volumetric clouds, water that reflects the sky, natural colours and fog. It is built on Photon by SixthSurge, under its licence, with Catalyst's own additions.
- The Nether fills with grey-brown smoke, lit warm by the lava below - and nothing on screen wobbles any more.
- The End's light is a black hole in a swirling vortex: a white-hot disk round a black shadow in a near-black sky, and the island lit bright and shadowed by it.
- Its settings in the Right Shift menu: Quality from Fast to Ultra, shadows, bloom, motion blur, fog, the Nether's smoke, the black hole and its vortex, and each dimension on or off. Fast, the default, looks almost like High for far more FPS - 91 against 64 on an M4 Pro at 2560x1440. It runs on Macs too. Off until you switch it on, under World.
- 500+ FPS: the game's frame cap (Max Framerate and VSync) comes off once, and EntityCulling, ImmediatelyFast, MoreCulling and BadOptimizations now come with Catalyst. Iris comes too, to run the shaders.
- The launcher's Mods page has Shaders and Texture Packs tabs: every shader and texture pack on Modrinth for your version, one click to add.
A black hole, Far View and PvP packs
A black hole in the End, Catalyst Shaders on for everyone with a High Quality option, Far View to 256 chunks, PvP texture packs and Smart Particles for more FPS.
- The End has a black hole: a glowing disk swirls round it, the sky bends round its edge, and the void beams pour out of it. Switch it off under The End in Catalyst Shaders.
- Catalyst Shaders is now on for everyone. High Quality, off unless you pick it, draws finer soft shadows, smoother rays and a crisper picture - for strong graphics cards.
- Far View: one click on the launcher's Mods page installs Distant Horizons and shows the world 256 chunks far - mountains and coasts all the way to the horizon. It starts light on your computer, and the far world fills in over a few minutes of play. Catalyst Shaders works with it.
- PvP texture packs on the Mods page: Spunky PvP, CPVP Essentials, PvP Swords and Low Shield. None is on until you add it - each comes from Modrinth, checked.
- Smart Particles, on by default, for more FPS: particles out of view aren't drawn, and the ones that lag the most - campfire smoke, fire smoke and falling leaves - are gone. Every other particle stays.
Catalyst Shaders
Our own shader, with a look for each dimension - sun rays, soft shadows, heat haze and violet void beams - in the Right Shift menu, no shader pack needed.
- Overworld: sun rays stream past trees and hills - golden at sunrise and sunset, moonlight at night - with a warm film look and a blue haze over the distance.
- Nether: the hot air shimmers, a haze glows in each biome's own colour, and lava glows.
- The End: a violet haze over the void, and beams of violet light falling between the pillars.
- In every dimension: soft shadows in corners and where blocks meet, and a soft glow round the brightest light.
- Switch each dimension on or off on its own, and set the rays, shadows, haze, colours and vignette.
- The best-known shader packs' ideas, written from scratch for Catalyst. It works with Sodium and steps aside while a shader pack is on.
Dragons, suits, auras and dances
Baby dragons on your shoulder, whole suits, glowing auras, backpacks, eleven emotes and logo capes - and a new store on the website, laid out like a real shop.
- Four baby dragons - Ember, Frost, Void and Golden - hover over your shoulder on beating wings, and Friend Head puts a friend's own head there.
- Suits over your skin: Robot, Ninja and the Pumpkin King. Armour still shows over them.
- Auras: embers, snow, orbiting motes, sparks, hearts or petals round you - only in third person, never in front of your eyes.
- Bodywear: the Explorer Backpack, the Rocket Pack and the Cozy Scarf.
- Emotes: press B in game for the emote wheel - Wave, Dab, Floss, Disco, Shuffle and more. Moving, jumping, attacking or being hurt stops one at once.
- Logo capes: Nebula, Summit and Sakura. The Founder Cape and the Early Supporter Cape are never sold - early players get them by code.
- The store on catalystclient.net: categories, search, filters, every item in 3D on a white player you can turn. The launcher's Cosmetics tab opens it signed in.
- None of it changes the game: no hitbox, speed or reach - only how you look.
Friends, clans and chat
Add friends by their Minecraft name, see where they are, chat with them and your clan - in the launcher and in game - and gift them coins.
- A Friends page in the launcher: friends, requests, a chat with each friend and with your clan.
- In game, press O (or Friends in the Right Shift menu) for the same friends and chat; their messages show in the chat too.
- Type /cclan to talk to your clan and /cmsg to message a friend, on any server.
- Start a clan with a name, a tag and a colour, and invite friends into it.
- Share a waypoint with your clan from the waypoint list - everyone in it sees it on that server.
- Gift coins to a friend from the Coins tab.
Host a world for your friends
Open your world to LAN and friends anywhere can join it - no port forwarding. They see you hosting and click Join.
- Press Esc, then Open to LAN: your world gets a public address (through e4mc, which the launcher installs).
- Your friends see "Hosting a world" on their Friends page and in game, with a Join button.
- Up to 7 friends at once - 20 with Catalyst Plus.
- Join also takes you straight to a friend's server.
Hats, pets and 200 new capes
Eight hats, six pets that ride on your shoulder, classic capes, meme capes and a flag for 181 countries.
- Hats: Party Hat, Knit Beanie, Baseball Cap, Straw Hat, a Propeller Cap that really spins, Chef Hat, Top Hat and Wizard Hat.
- Pets on your shoulder that breathe, look about, blink and wag: three hamsters, a capybara with an orange, a penguin in a scarf and a red panda.
- Classic capes with one bold emblem each, and meme capes - Skill Issue, GG EZ, Touch Grass and more.
- A flag cape for 181 countries.
- The Store has a chip for each kind, in its own colour, and a search box.
Real daily presents, and coins that add up
Daily rewards give real hats and a hamster every month, battle pass coins can be collected, and your coins live in your Catalyst account.
- A hat on the 7th, 14th and 21st, and a hamster on the month's last day - different ones every month.
- Coins from daily rewards, the battle pass and codes go into your account, and you buy with them.
- Everything in the Store is bought - nothing is free to wear.
- Collect the battle pass's free coins from its track.
Sign in with Microsoft
Catalyst now signs you in with your Microsoft account - Mojang has reviewed the app and allowed it. Sign in once on Microsoft's own page, and Play starts the game as you.
- Add account opens Microsoft's sign-in page in your browser - Catalyst never sees your email or password.
- Microsoft asks which account to use, so you can pick the one that owns Minecraft.
- Play starts the game as your account: your name, your skin, and online servers.
- Your sign-in renews itself when it runs out, so you rarely have to sign in again.
- Switch account signs in with another account; Sign out forgets it on this computer.
CurseForge is on
The Mods page searches CurseForge as well as Modrinth.
- The CurseForge tab shows its mods for your profile's Minecraft version and loader, with categories and sorting.
- All shows both platforms at once, each row saying where a mod is from.
- Install on a CurseForge mod links to its CurseForge page for now - installing straight from CurseForge comes once CurseForge confirms it.
A new colour picker
Picking a colour in the Right Shift menu is bigger and simpler - and it asks before throwing a change away.
- A large colour field, hue and opacity sliders, and a before-and-after swatch - click its left half to go back.
- Type a colour as HEX, or as R, G, B and A.
- Sixteen preset colours, one click each.
- Save keeps the colour. Leaving with a change unsaved asks: save, discard, or keep editing.
Sky Shaders, and a box behind your HUD
Six animated skies, a background behind every HUD element, and an Edit HUD that is easier to arrange.
- Sky Shaders: an aurora, a nebula, a galaxy, End beams, caustics or a black hole, drawn by your graphics card - your screen only.
- Choose its colour, brightness, speed and stars, or keep it for the night.
- Every HUD element can have a background box, in your colour, opacity, corners and padding.
- Edit HUD: elements are easier to grab, snap to each other and to the screen's edges, and stick together when dropped close.
- Shift and the arrow keys nudge an element; Ctrl+Z undoes a move.
3D wings and gauntlets
Wings modelled in 3D, the Stoneheart set and the Arcane Iron Gauntlet - worn in game, on your own player.
- Raven, Wyvern, Seraph, Void Butterfly, Shattered and Crow Wings: 3D wings that beat, glide and fold as you move.
- The Stoneheart Wings and Stoneheart Gauntlet: gold, set with glowing stones that shed sparks.
- The Arcane Iron Gauntlet: cold iron and green fire.
- Wear in game, from the Store - a cape, wings and a gauntlet at once. For now only you see them.
Mods from Modrinth and CurseForge, into the profile you pick
Search both platforms at once, install into a profile with everything a mod needs, and keep mods up to date - all from the launcher.
- All, Modrinth and CurseForge tabs, with filters for Minecraft version, loader, category and sort.
- Every row shows where a mod is from, its loader and the Minecraft versions it is made for.
- Install shows what will be installed - the mods it needs, and optional ones to tick - before anything is downloaded.
- A mod that doesn't fit your profile says why, and offers to make a profile it does fit.
- Downloads are checked against their hashes, and a failed update keeps the version that worked.
- Installed shows the updates available for your mods, each with Update.
- CurseForge turns on once the design site has its key; until then Modrinth works alone.
A calmer launcher, and Modrinth mods
Fewer boxes everywhere, a Mods page that browses and installs mods from Modrinth, and redeem codes that work the moment they are made.
- Settings, Play, Controls and News rebuilt without a box round every row - plain rows parted by thin lines.
- Mods now browses Modrinth: search, sort and filter Fabric mods for 1.21.4, and install them with one click.
- Redeem codes are checked online, so a new code works straight away and can only be used once.
- Memory shows what your computer has and what the running game really got.
- A new battle pass icon, a brighter Shop and Coins tab, and real updates on this page.
Minimap and projectile prediction
A map of the terrain around you, the path your projectiles will fly, and colours of your own for highlighted items.
- Minimap: a map of the terrain around you in the corner - square or round, and it can turn with you.
- Projectile Prediction: while you aim, see the path of arrows, tridents, pearls, snowballs, potions, bottles and wind charges, with a ball where they land.
- Item Highlighter: every chosen item can have its own colour, picked straight from the item list.
- Shulker Preview takes on the colour of the box you hover.
Redeem codes, prices and the battle pass
Codes for coins, sales, free items and exclusives - plus prices for wings and a battle pass that costs $8.99.
- Redeem a code from the Coins tab: coins, a sale on wings, a free item or a code-only exclusive.
- Wings now have prices: Moth 1,500, Frost 2,000, Molten 2,400 and Prism 2,500 coins.
- The battle pass is $8.99, with a choice of a hat or a gauntlet at level 25 and wings at level 50.
- Daily rewards are a row of cards with pixel prizes, a lucky block on lucky days and streak saves.
Fullbright, Clear Water and better hitboxes
See in the dark without a potion, see through water, and hitboxes that follow F3+B.
- Fullbright: dark places lit as if by day - no potion effect and no gamma change.
- Clear Water: water fog pushed out to your render distance, and no murky overlay under water.
- Hitbox Outline and F3+B are now one switch, and replace the game's white boxes while on.
- Custom Crosshair is drawn in Minecraft's own pixels, with a new Invert Like Vanilla blend.
A title screen that is yours
Drag, resize and recolour every button, star your favourite servers, and pick a moving background.
- Edit mode: drag any button, resize it from its corner, set its opacity and colour.
- A glass dock you can move anywhere and turn sideways.
- Favourite servers under Realms and Mods, with live ping, and Quick Play.
- A background picker with nine shader backgrounds and pictures that drift under rolling fog.
Item Physics, Custom Crosshair and Waypoints
Items that tumble and lie flat, seven crosshair shapes, totem pop counts, and waypoints with beams.
- Item Physics: dropped items tumble as they fall and lie flat on the ground.
- Custom Crosshair: seven shapes, with colour, size, gap, thickness, outline and a colour for when it is on a target.
- Hitbox Outline: players, mobs, items and the rest in their own colours.
- Totem Pops & Health: health and totems popped above each player's name tag.
- Waypoints: B marks where you stand, N opens the list. Beams with names and distances, and a death waypoint.
Custom Sky and eight new modules
Lavender days, pink dusks and a navy night with a Milky Way - and eight new modules to go with them.
- Custom Sky: a dreamier Overworld sky with soft drifting clouds, and fog to match. Follow the time, always twilight, or always night.
- Fog Customiser, Hotbar Animations, Free Look (hold Left Alt), Ender Pearl Trail, Custom Hand, Cooldowns and Particles.
- F7 captures a 360-degree title-screen background from where you stand.
The launcher's living home
A backdrop that moves, a Launch button that ripples, and a Home page you can rearrange.
- The Deep Dark hall runs behind the whole window, with a pointer trail and click ripples on Home.
- Customise mode: move, resize, fade and recolour the pieces of Home.
- Catalyst's own logo in the macOS Dock instead of Java's.
- Every Minecraft release on the Play page, grouped by major version.
Take/Deposit, Shulker Preview and Auto Text
Move whole rows of items with one click, look inside shulker boxes, and send messages with a key.
- Take / Deposit: arrow buttons beside chest and inventory rows to move or drop them.
- Shulker Preview: hold a key over a shulker box to see inside.
- Auto Text: press a key to send a message or run a command.
Themes for the launcher and the menu
Eight colour schemes and a custom colour - and the in-game menu wears whichever you pick.
- Presets: Default, Deepslate, Amethyst, Cherry, Redstone, Copper, Emerald and Prismarine, each dark or light.
- Or pick one colour and the launcher builds a whole palette from it.
- The Right Shift menu in game follows the launcher's scheme.
- The community design site went live - submit a cape and vote on the rest.
Your own sounds, Time Changer and Reminders
Custom hit, place and break sounds, a cape and inventory background of your own, and two new modules.
- The client plays the sounds and shows the cape and inventory background you set on the Controls page.
- Time Changer: lock the sky to the time of day you like, on your screen only.
- Reminder: timed notes in chat, as a toast or on the HUD.
The first modules
FPS, Zoom, Auto Sprint, Toggle Sneak/Sprint, Slot Lock, Armour Status and Saturation.
- FPS and Ping with colours, Zoom, Auto Sprint and Toggle Sneak/Sprint.
- Slot Lock: chosen hotbar slots can't be dropped with Q.
- Armour Status: durability of each piece, with a warning before one breaks.
- Saturation: hidden saturation as a gold outline on your hunger bar.