CatalystClientDownload
Download

Get Catalyst.

One launcher for Windows and macOS. It runs Minecraft 1.21.4 with Fabric, with Sodium, Lithium and Dynamic FPS already in.

Catalyst for Windows

Installer (.msi)

Not out yet

Catalyst for macOS

Disk image (.dmg)

Not out yet

Coming 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 1.21.4, run with Fabric by the launcher.
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.
Release notes

What's new.

The latest from the launcher's News page - real changes only.

  1. Launcher

    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.
  2. Launcher

    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.
  3. Client

    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.
  4. Store

    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.
  5. Client

    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.
  6. Client

    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.