You can use Bitrise.io ( CEO here ) as well to build your macOS app. Give it a try and let us know how you like it! We’re glad to help with setup too.
Re:Apple acquires Buddybuild
by ajeet_dhaliwal on Tuesday January 02, 2018 @08:48PM
(#16057640)
Thanks that makes sense.
Since iOS apps can only be legally built on apple hardware, if you were an iOS developer and didn't want to maintain your own mac minis, you knew about them and the few other providers.