Other CI/testing services like travis-Ci

(trying to) Maintaining a package with some downstream dependents i get often issues with ‘doesn’t build here’ or ‘doesn’t test here’ and ‘here’ usually is a OS configuration/version that i don’t have locally available or that isn’t in the set of travis/appveyor.

Is there other services you can recommend - especially for MacOS?

Could work on Gitlab, but I haven’t tried this personally:

Note that setting up Gitlab CI for the first time is a bit more involved than just generating the Travis control file with eg PkgDev and clicking a few buttons, but it is manageable.

i cannot follow, do they support different versions of OSX?

I am not sure, you have to look at GitLab.org / gitlab-runner · GitLab.