Requirements

Catalyst manages local Minecraft server processes. The app can download server JARs, managed Java runtimes, Modrinth content, and ngrok binaries when those features are used.

Desktop requirements

Area	Requirement
Operating system	Windows is the primary packaged target. macOS and Linux build targets exist for development packaging.
Memory	Enough RAM for the app, the operating system, and each server. Catalyst keeps at least about 1 GB free and caps server allocation at about 80% of total memory.
Disk	Space for server folders, worlds, logs, backups, exports, Java runtimes, Modrinth files, and analytics data.
Network	HTTPS access for server downloads, Modrinth, GitHub release checks, ngrok installation, and optional Java runtime downloads.

Accounts and tokens

Required
Optional

No Catalyst account is required. Minecraft server usage still follows Mojang’s EULA and the rules of the server software you choose.

Java requirements

Catalyst detects installed Java runtimes and can download managed Adoptium runtimes when needed. The required major version depends on the Minecraft version:

Minecraft version	Java
1.20.5 and newer	Java 21
1.17 through 1.20.4	Java 17
1.12 through 1.16.5	Java 11
1.7.10 through 1.11.2	Java 8

A custom Java executable can be assigned per server from the server settings tab. Restart the server after changing it.

Quickstart Installation

Start

Use Catalyst

Reference

Developers

Project

Desktop requirements

Accounts and tokens

Java requirements

​Desktop requirements

​Accounts and tokens

​Java requirements

Desktop requirements

Accounts and tokens

Java requirements