brew upgrade doesn't recognize macOS 15 anymore

[thomas-corte]

Output of brew config

HOMEBREW_VERSION: 3.6.21-89-ged79381
ORIGIN: https://github.com/Homebrew/brew
HEAD: ed793811553eb6fca3dd602931e37b7187f86a68
Last commit: 2 years, 4 months ago
Core tap origin: https://github.com/Homebrew/homebrew-core
Core tap HEAD: e727a80f18b8b5d4943874e540600f974524ddb7
Core tap last commit: 70 minutes ago
Core tap branch: master
Core tap JSON: 27 Jun 09:31 UTC
HOMEBREW_PREFIX: /opt/homebrew
HOMEBREW_CASK_OPTS: []
HOMEBREW_DISPLAY: /private/tmp/com.apple.launchd.2NWlxCVBhs/org.xquartz:0
HOMEBREW_MAKE_JOBS: 12
http_proxy: http://proxy.knipp.de:8080
https_proxy: http://proxy.knipp.de:8080
Homebrew Ruby: 2.6.8 => /opt/homebrew/Library/Homebrew/vendor/portable-ruby/2.6.8_1/bin/ruby
CPU: dodeca-core 64-bit arm_blizzard_avalanche
Clang: 17.0.0 build 1700
Git: 2.50.0 => /opt/homebrew/bin/git
Curl: 8.7.1 => /usr/bin/curl
macOS: 15.5-arm64
CLT: 16.4.0.0.1.1747106510
Xcode: 16.4
Rosetta 2: false

Output of brew doctor

Please note that these warnings are just used to help the Homebrew maintainers
with debugging if you file an issue. If everything you use Homebrew for is
working fine: please don't worry or file an issue; just ignore this. Thanks!

Warning: Some installed kegs have no formulae!
This means they were either deleted or installed manually.
You should find replacements for the following formulae:
  imlib2
  ant
  boost-python3
  hwloc
  lame
  jdupes
  libtiff
  gmp
  wget
  ffmpeg
  pinentry
  libopusenc
  xorgproto
  two-lame
  adwaita-icon-theme
  libidn2
  mas
  python-packaging
  cpanminus
  libxau
  little-cms2
  libsoup
  libpng
  ncurses
  pygobject3
  ghostscript
  taglib
  gtk+3
  sub2srt
  nettle
  pixman
  mpdecimal
  libxdmcp
  opus
  mame
  freetype
  ncmpc
  mpfr
  yt-dlp
  rtmpdump
  par2
  boost
  python@3.13
  libavif
  smartmontools
  libunistring
  libmediainfo
  pango
  openjpeg
  openjdk@11
  ldns
  wifi-password
  apr-util
  gtksourceview4
  gdk-pixbuf
  maven
  libogg
  libmpdclient
  libadwaita
  shared-mime-info
  unzip
  libdvdread
  perl
  harfbuzz
  python@3.12
  libbluray
  glib
  libxcb
  sevenzip
  readline
  csvtk
  at-spi2-core
  gtksourceview5
  potrace
  llvm
  lz4
  graphite2
  ncmpcpp
  dbus
  nss
  libarchive
  gcc
  cairo
  webp
  sqlite
  libgpg-error
  gobject-introspection
  fribidi
  id3lib
  xz
  whois
  libnghttp2
  dvdbackup
  lua
  bash
  openexr
  libgcrypt
  fontconfig
  gradle
  rdap
  htop
  gtk4
  libdvdcss
  openjdk
  giflib
  media-info
  pkgconf
  certifi
  speedtest-cli
  libxrender
  pdftk-java
  flac
  openssl@3
  ca-certificates
  gettext
  mpc
  libssh2
  eye-d3
  openapi-generator
  librsvg
  zstd
  pwgen
  handbrake
  opus-tools
  sslscan
  apr
  libxext
  clisp
  mplayer
  yydecode
  watch
  libraw
  inetutils
  libssh
  pcre2
  btop
  gstreamer
  leptonica
  jpeg-xl
  dos2unix
  rom-tools
  node
  libomp
  unbound
  opusfile
  jpeg
  nmap
  poppler
  sdl2
  bind
  a52dec
  appstream
  imagemagick
  pmix
  tag
  gnupg
  subversion
  libsndfile
  p11-kit
  libx11
  icu4c@76
  texlive
  git
  lzo
  jpeg-turbo
  gnutls
  stress
  icu4c@77

Warning: gettext files detected at a system prefix.
These files can cause compilation and link failures, especially if they
are compiled with improper architectures. Consider removing these files:
  /opt/homebrew/lib/libgettextlib.dylib
  /opt/homebrew/lib/libintl.dylib
  /opt/homebrew/include/libintl.h

Warning: Unbrewed dylibs were found in /usr/local/lib.
If you didn't put them there on purpose they could cause problems when
building Homebrew formulae, and may need to be deleted.

Unexpected dylibs:
  /usr/local/lib/libDellMonitorSdkLib.dylib
  /usr/local/lib/libdvdcss.2.dylib
  /usr/local/lib/libdvdcss.dylib

Warning: Unbrewed static libraries were found in /usr/local/lib.
If you didn't put them there on purpose they could cause problems when
building Homebrew formulae, and may need to be deleted.

Unexpected static libraries:
  /usr/local/lib/libdvdcss.a

Warning: You have unlinked kegs in your Cellar.
Leaving kegs unlinked can lead to build-trouble and cause formulae that depend on
those kegs to fail to run properly once built. Run `brew link` on these:
  openjdk
  apr
  libomp
Error: Livecheck#formula expects a String
/opt/homebrew/Library/Homebrew/livecheck.rb:65:in `formula'
/opt/homebrew/opt/gstreamer/.brew/gstreamer.rb:16:in `block (3 levels) in <class:Gstreamer>'
/opt/homebrew/Library/Homebrew/resource.rb:219:in `instance_eval'
/opt/homebrew/Library/Homebrew/resource.rb:219:in `livecheck'
/opt/homebrew/opt/gstreamer/.brew/gstreamer.rb:15:in `block (2 levels) in <class:Gstreamer>'
/opt/homebrew/Library/Homebrew/resource.rb:43:in `instance_eval'
/opt/homebrew/Library/Homebrew/resource.rb:43:in `initialize'
/opt/homebrew/Library/Homebrew/software_spec.rb:139:in `new'
/opt/homebrew/Library/Homebrew/software_spec.rb:139:in `resource'
/opt/homebrew/opt/gstreamer/.brew/gstreamer.rb:11:in `block in <class:Gstreamer>'
/opt/homebrew/Library/Homebrew/formula.rb:2985:in `instance_eval'
/opt/homebrew/Library/Homebrew/formula.rb:2985:in `stable'
/opt/homebrew/opt/gstreamer/.brew/gstreamer.rb:6:in `<class:Gstreamer>'
/opt/homebrew/opt/gstreamer/.brew/gstreamer.rb:1:in `block in load_formula'
/opt/homebrew/Library/Homebrew/formulary.rb:90:in `module_eval'
/opt/homebrew/Library/Homebrew/formulary.rb:90:in `block in load_formula'
/opt/homebrew/Library/Homebrew/formulary.rb:102:in `load_formula'
/opt/homebrew/Library/Homebrew/formulary.rb:122:in `load_formula_from_path'
/opt/homebrew/Library/Homebrew/formulary.rb:331:in `load_file'
/opt/homebrew/Library/Homebrew/formulary.rb:321:in `klass'
/opt/homebrew/Library/Homebrew/formulary.rb:316:in `get_formula'
/opt/homebrew/Library/Homebrew/formulary.rb:573:in `factory'
/opt/homebrew/Library/Homebrew/formulary.rb:625:in `rescue in from_keg'
/opt/homebrew/Library/Homebrew/formulary.rb:620:in `from_keg'
/opt/homebrew/Library/Homebrew/formulary.rb:594:in `from_rack'
/opt/homebrew/Library/Homebrew/diagnostic.rb:716:in `block in check_for_unreadable_installed_formula'
/opt/homebrew/Library/Homebrew/diagnostic.rb:715:in `each'
/opt/homebrew/Library/Homebrew/diagnostic.rb:715:in `check_for_unreadable_installed_formula'
/opt/homebrew/Library/Homebrew/cmd/doctor.rb:64:in `block in doctor'
/opt/homebrew/Library/Homebrew/cmd/doctor.rb:57:in `each'
/opt/homebrew/Library/Homebrew/cmd/doctor.rb:57:in `doctor'
/opt/homebrew/Library/Homebrew/brew.rb:93:in `<main>'

Description of issue

After upgrading my homebrew install today like this:

brew update; brew upgrade --greedy; brew autoremove; brew cleanup

not much seems to work anymore, see doctor output. I can still exexute git, but svn for example yields

% svn
dyld[76026]: Library not loaded: /opt/homebrew/opt/utf8proc/lib/libutf8proc.3.dylib
Referenced from: <9BEF5832-FFE6-3B7E-95B8-6F89EA1D0950> /opt/homebrew/Cellar/subversion/1.14.5_2/bin/svn
Reason: tried: '/opt/homebrew/opt/utf8proc/lib/libutf8proc.3.dylib' (no such file), '/System/Volumes/Preboot/Cryptexes/OS/opt/homebrew/opt/utf8proc/lib/libutf8proc.3.dylib' (no such file), '/opt/homebrew/opt/utf8proc/lib/libutf8proc.3.dylib' (no such file)
Abort

[SMillerDev]

HOMEBREW_VERSION: 3.6.21-89-ged79381
ORIGIN: https://github.com/Homebrew/brew
HEAD: ed793811553eb6fca3dd602931e37b7187f86a68
Last commit: 2 years, 4 months ago

Not sure what you updated, but that's a very old version. I'd recommend running brew update-reset to delete all modifications.

[twiebe]

Ran into the same issue today, so it was not just you @thomas-corte.

This is how it started:

+ brew update
==> Updating Homebrew...
==> Downloading https://ghcr.io/v2/homebrew/portable-ruby/portable-ruby/blobs/sha256:cf9137b1da5568d4949f71161a69b101f60ddb765e94d2b423c9801b67a1cb43
######################################################################################################################################################### 100.0%
==> Pouring portable-ruby-2.6.8_1.arm64_big_sur.bottle.tar.gz
==> Tapping homebrew/core
Cloning into '/opt/homebrew/Library/Taps/homebrew/homebrew-core'...
remote: Enumerating objects: 2727202, done.
remote: Counting objects: 100% (11/11), done.
remote: Compressing objects: 100% (7/7), done.
remote: Total 2727202 (delta 9), reused 4 (delta 4), pack-reused 2727191 (from 2)
Receiving objects: 100% (2727202/2727202), 938.57 MiB | 1.62 MiB/s, done.
Resolving deltas: 100% (2035140/2035140), done.
Tapped 4 commands (8,065 files, 1GB).
==> Updated Homebrew from 4fd7c6fa8d to 415c0de6b2.
No changes to formulae.
+ brew upgrade
Running `brew update --auto-update`...
Warning: You are using macOS 15.
We do not provide support for this pre-release version.
You will encounter build failures with some formulae.
Please create pull requests instead of asking for help on Homebrew's GitHub,
Twitter or any other official channels. You are responsible for resolving
any issues you experience while you are running this
pre-release version.

Error: unknown or unsupported macOS version: :dunno
+ brew upgrade --cask --greedy
Error: unknown or unsupported macOS version: :dunno

That was 09:34 CEST / 07:34 UTC - in case it plays a role for whatever state the repo was in/was served at the time.

brew update-reset did fix it for me. Thanks @SMillerDev!

[thomas-corte]

Indeed, "brew update-reset" repaired it for me, too. Had to reinstall some dependencies that were missing all of a sudden, but now all formulae seem to work again, including svn, tar etc. Thanks!

Still, something must have gone awry with some recent git commits, otherwise I can't explain why my upgrade process that used to work for years (brew update; brew upgrade --greedy; brew autoremove; brew cleanup) wrecked my installation today (which seemingly happened for other users, too).

[gromgit]

Your brew config said that only your brew installation was out of date, which in many cases is a result of a Git checkout to a different branch. When formulae start using new features or assuming certain base functionality, this divergence will cause issues at some point. (I did a PR last year to make brew config print brew's own branch because of this issue.)

brew update-reset resets all local Homebrew repos to their default branches, so everything's back in sync.

[thomas-corte]

Ok, I don't recall ever consciously installing a specific Git branch of brew, but it's possible (maybe as a workaround after the last macOS update, ¯_(ツ)_/¯). Anyhow, thanks for the help, everything works again.