Mac OS: Library not loaded libprotobuf.23.4.0.dylib

[jozefvaclavik]

I'm on a latest (as of now) Mac OS Sonoma 14.2.1 and recently ran brew update and brew upgrade.

Since then I cant start mosh-server with missing libprotobuf

  Referenced from: <A4ADD9D7-6104-317D-9439-1B7B22B6E105> /usr/local/bin/mosh-server
  Reason: tried: '/opt/homebrew/opt/protobuf/lib/libprotobuf.23.4.0.dylib' (no such file), '/System/Volumes/Preboot/Cryptexes/OS/opt/homebrew/opt/protobuf/lib/libprotobuf.23.4.0.dylib' (no such file), '/opt/homebrew/opt/protobuf/lib/libprotobuf.23.4.0.dylib' (no such file), '/usr/local/lib/libprotobuf.23.4.0.dylib' (no such file), '/usr/lib/libprotobuf.23.4.0.dylib' (no such file, not in dyld cache), '/opt/homebrew/Cellar/protobuf/25.2/lib/libprotobuf.23.4.0.dylib' (no such file), '/System/Volumes/Preboot/Cryptexes/OS/opt/homebrew/Cellar/protobuf/25.2/lib/libprotobuf.23.4.0.dylib' (no such file), '/opt/homebrew/Cellar/protobuf/25.2/lib/libprotobuf.23.4.0.dylib' (no such file), '/usr/local/lib/libprotobuf.23.4.0.dylib' (no such file), '/usr/lib/libprotobuf.23.4.0.dylib' (no such file, not in dyld cache)
Could not start mosh-server.

mosh and mosh-server has been installed through brew. I tried reinstalling protobuf and then mosh-server, but that didnt do much.

I can't find protobuf@23 on homebrew anymore and latest protobuf points to 25.2.

Any ideas how to get mosh-server working again?

[keithw]

I think you probably want to file this with homebrew; I think it's likely to be an issue in homebrew's dependency management unrelated to Mosh.

[jozefvaclavik]

Isn't it mosh who requires libprotobuf.23.4.0? I'm not sure how system dependencies works here. I'll drop an issue there as well.

[keithw]

Mosh requires whatever version of protobuf it was linked against. Homebrew is the one doing the linking. If Homebrew upgraded and renamed protobuf (or any other library), it needs to relink the executables that depend on it. This is maybe not "package management 101," but definitely "package management 102" or so. :-)

[chenrui333]

@jozefvaclavik would brew reinstall mosh works for you? feel free to drop an issue on the homebrew side.