brew/docs/Support-Tiers.md

last_review_date

last_review_date
2025-03-28

Support Tiers

Homebrew has three support tiers. These set expectations for how well Homebrew will run on a given configuration.

Tier 1

A Tier 1 supported configuration is one in which:

• you're setup to get the best experience using Homebrew
• we will aim to fix reproducible bugs affecting this configuration
• we will not output warnings about running on this configuration
• we have CI coverage for automated testing and building bottles for this configuration
• your support is best met through Homebrew's issue trackers
• Homebrew may block merging a PR if it doesn't build properly on this configuration

macOS

For Tier 1 support, Homebrew on macOS must be all of:

• running on official Apple hardware (e.g. not a "Hackintosh" or VM)
• running a version of macOS supported by Apple on that hardware (e.g. not using OpenCore Legacy Patcher)
• running a version of macOS with Homebrew CI coverage (i.e. the latest stable or prerelease version, two preceding versions)
• installed in the default prefix (i.e. /opt/homebrew on Apple Silicon, /usr/local on Intel x86_64)
• running on a supported architecture (i.e. Apple Silicon or Intel x86_64)
• not building official packages from source
• installed on your Mac's built-in hard-drive (i.e. not external/removable storage)
• you have sudo access on your system
• the Xcode Command Line Tools are installed and fully up-to-date

Linux

For Tier 1 support, Homebrew on Linux must be all of:

• running on Ubuntu or a Homebrew-provided Docker image
• have a system glibc >= 2.35
• if running Ubuntu, running an Ubuntu version in "standard support": https://ubuntu.com/about/release-cycle
• installed in the default prefix (i.e. /home/linuxbrew/.linuxbrew)
• running on a supported architecture (i.e. Intel x86_64)
• not building official packages from source
• you have sudo access on your system

Tier 2

A Tier 2 supported configuration is one in which any of:

• you get a subpar but potentially still usable experience using Homebrew
• we review PRs that fix bugs affecting this configuration but will not aim to fix bugs
• we will output brew doctor warnings running on this configuration
• we have partial CI coverage for testing and building bottles for this configuration so some bottles will not be available
• we will close issues only affecting this configuration
• your support is best met through Homebrew's Discussions

Tier 2 configurations include:

• macOS prereleases before we state they are Tier 1 (e.g. in March 2025, macOS 16, whatever it ends up being called)
• Linux versions where a system glibc < 2.35 (but still >= 2.13), so the Homebrew glibc formula is automatically installed
• using official packages that need to be built from source due to installing Homebrew outside the default prefix (i.e. /opt/homebrew on Apple Silicon, /usr/local on Apple Intel x86_64, /home/linuxbrew/.linuxbrew for Linux)
• running on a not-yet-supported architecture (i.e. Linux ARM64/AARCH64)

Tier 3

A Tier 3 supported configuration is one in which:

• you get a poor but not completely broken experience using Homebrew
• we strongly recommend migrating to a Tier 1 or 2 configuration or a non-Homebrew tool
• we will only review PRs with a very high bar: any changes must be proven by the author to fix (not work around) an issue and not come with high maintainability costs (no patches)
• we will generally not aim to fix bugs ourselves affecting this configuration
• we may intentionally regress functionality on this configuration if it e.g. improves things for other configuration
• we will output noisy warnings running on this configuration
• we are lacking any CI coverage for testing or building bottles for this configuration so few bottles will be available
• we will close without response issues only affecting this configuration
• your support is best met through Homebrew's Discussions

Tier 3 configurations include:

• macOS versions for which we no longer provide CI coverage and Apple no longer provides most security updates for (e.g. as of March 2025, macOS Monterey/12 and older)
• building official packages from source when binary packages are available
• installing Homebrew outside the default prefix (i.e. /opt/homebrew on Apple Silicon, /usr/local on Apple Intel x86_64, /home/linuxbrew/.linuxbrew for Linux)
• installing formulae using --HEAD
• installing deprecated or disabled formulae

Unsupported

An unsupported configuration is one in which:

• Homebrew will refuse to run at all without third-party patching
• You must migrate to another tool (e.g. Tigerbrew, MacPorts, Linux system package managers etc.)

Tier 3 configurations include:

• FreeBSD
• macOS 10.6
• Beowulf clusters
• Nokia 3210s
• CPUs built inside of Minecraft
• toasters

Unsupported Software

Note that all packages installed from third-party taps outside of the Homebrew GitHub organisation are unsupported by default.

We may assist the maintainers/contributors/developers of such packages to fix bugs with the Homebrew formula/cask/tap system, but we are not responsible for resolving issues when using that software.

Bugs that only manifest when using third-party formulae/casks may be closed.