The best free CI system in the world has macOS 15 runners running at 75% capacity due to a background process that consumes 100% CPU [1]. The problem is known to them since May but not fixed half a year later.

[1] https://github.com/actions/runner-images/issues/13358

So tell us where is the better free macOS CI provider? I would love to switch to them.

That is what I meant by the BEST FREE CI provider. It is not the best if you have money for something better.

I would love to know it. I use GH Actions to test my open source code on MacOS, Windows and Linux FOR FREE which is amazing. Without them I just wouldn't test on anything other than what I happen to have locally or what TravisCI/CircleCI had in their free tier before GH Actions made things so much easier.

But if you do know of alternatives, I'm all ears.

Yes I want to know too. Where can I run this test matrix for less than $100/mo unbilled (where half the “cost” is from macOS alone): https://github.com/ncruces/go-sqlite3/wiki/Support-matrix

I built a similar matrix to test wazero (of which I'm a maintainer).

Unfortunately I don’t really know what a CI provider should do to fix this.