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unknown or unsupported macOS version: "26.2" #8684

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@longdafeng

Description

/opt/homebrew/Library/Homebrew/macos_version.rb:43:in initialize': unknown or unsupported macOS version: "26.2" (MacOSVersion::Error) from /opt/homebrew/Library/Homebrew/os/mac.rb:39:in new'
from /opt/homebrew/Library/Homebrew/os/mac.rb:39:in full_version' from /opt/homebrew/Library/Homebrew/os/mac.rb:28:in version'
from /opt/homebrew/Library/Homebrew/os.rb:60:in <module:OS>' from /opt/homebrew/Library/Homebrew/os.rb:9:in <top (required)>'
from /opt/homebrew/Library/Homebrew/global.rb:79:in require' from /opt/homebrew/Library/Homebrew/global.rb:79:in <top (required)>'
from /opt/homebrew/Library/Homebrew/brew.rb:18:in require_relative' from /opt/homebrew/Library/Homebrew/brew.rb:18:in

'

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Steps to reproduce

brew install anomalyco/tap/opencode

Warning: No remote 'origin' in /opt/homebrew/Library/Taps/homebrew/homebrew-services, skipping update!
Running brew update --auto-update...
/opt/homebrew/Library/Homebrew/macos_version.rb:43:in initialize': unknown or unsupported macOS version: "26.2" (MacOSVersion::Error) from /opt/homebrew/Library/Homebrew/os/mac.rb:39:in new'
from /opt/homebrew/Library/Homebrew/os/mac.rb:39:in full_version' from /opt/homebrew/Library/Homebrew/os/mac.rb:28:in version'
from /opt/homebrew/Library/Homebrew/os.rb:60:in <module:OS>' from /opt/homebrew/Library/Homebrew/os.rb:9:in <top (required)>'
from /opt/homebrew/Library/Homebrew/global.rb:79:in require' from /opt/homebrew/Library/Homebrew/global.rb:79:in <top (required)>'
from /opt/homebrew/Library/Homebrew/brew.rb:18:in require_relative' from /opt/homebrew/Library/Homebrew/brew.rb:18:in

'
/opt/homebrew/Library/Homebrew/macos_version.rb:43:in initialize': unknown or unsupported macOS version: "26.2" (MacOSVersion::Error) from /opt/homebrew/Library/Homebrew/os/mac.rb:39:in new'
from /opt/homebrew/Library/Homebrew/os/mac.rb:39:in full_version' from /opt/homebrew/Library/Homebrew/os/mac.rb:28:in version'
from /opt/homebrew/Library/Homebrew/os.rb:60:in <module:OS>' from /opt/homebrew/Library/Homebrew/os.rb:9:in <top (required)>'
from /opt/homebrew/Library/Homebrew/global.rb:79:in require' from /opt/homebrew/Library/Homebrew/global.rb:79:in <top (required)>'
from /opt/homebrew/Library/Homebrew/brew.rb:18:in require_relative' from /opt/homebrew/Library/Homebrew/brew.rb:18:in '

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Activity

  1. jairuigou commented on Jan 25, 2026

    @jairuigou

    It seems to be because your Homebrew doesn't support macOS 26.2 yet. Try updating Homebrew first.

  2. YanJiaHuan commented on Feb 14, 2026

    @YanJiaHuan

    hi, i am using macos 26.2 also,any update? avoid using brew tool ?

  3. github-actions commented on Apr 16, 2026

    @github-actions
    Contributor

    To stay organized issues are automatically closed after 90 days of no activity. If the issue is still relevant please open a new one.

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