macos-14 runner (arm64) failure to invoke protoc, with homebrew protobuf version 26.1.

[YOU54F]

I have some gRPC tests which run against multiple runners.

I noted failures, without any codechanges on the macos-14 gha runner.

I have a step to install protobuf from homebrew

• formula link

The only thing that has changed between the runs, is the version of protobuf held by homebrew, which was updated on the 1st April to 26.1 from 25.3 (commit)

Pinning the version to 25.3 with setup-protoc action resolves the issue in my test runs.

• Failing run with 26.1
• Passing run with 25.3

The screenshot below shows the original issue, a passing run three months ago

The change was removing cirrus-ci in this commit

and the failing build, with the install of proto 26.1

I think it would be nice to update the default version of protoc so it supports arm, meaning a user doesn't have to manually install it

related #33

It would still be a problem for users who have protoc 26.x installed.

Not sure what the actual root cause is, but thought I would just document here whilst its fresh in my mind

[YOU54F]

Protobuf 27.x is also broken, when loading the pact-protobuf-plugin on macos-arm via the pact_ffi in PHP, Swift, Dotnet, Lua

[YOU54F]

0.4.0 of pact-protobuf-plugin now includes 21.12 version of protocol buffers, which supports macos arm64 so I won't need to manually install protobuf compilers. Can't use homebrew as it always points to the latest. Closing as I'm not sure if its an issue we need to solve at our side.