[mmanulis]

+1 to Concourse. Though if the OP needs OS X build support, there is no escaping needing a Mac box to run it on.

One can still run Concourse on a Mac Mini if one chooses, not that much extra work. This is the simplest solution but you will still need XCode Server last time I checked (been a while). I'm sure there are ways to hack around it, just a matter of time vs money question.

Both Travis CI and Circle CI offer Mac builds, so if one is willing to spend some money, that's an option.

Having had to run my own CI infrastructure, I'd rather pay someone else to deal with it. Especially if your deploys are tied to it, as once it breaks, and it will do it, your entire pipeline is down.

I ended up spending a good chunk of my own time dealing with failing builds or having a couple of people on my team be the point-persons for CI/CD infra.