[btbuilder]

It at least has the virtualization framework now. There’s a product called Anka that plugs into Jenkins and lets you deploy macOS VM images as build agents on top of physical Apple hardware. While slower than containers, and limited to 2 VMs (?!?) you can have reproducible and sane build environments via VM images.

[sigh_again]

It's limited to 2 VMs because Apple's software license agreement for MacOS: https://www.apple.com/legal/sla/docs/macOSSequoia.pdf

    to install, use and run up to two (2) additional copies or instances of the Apple Software, or any prior macOS or OS X operating system software or subsequent release of the Apple Software, within virtual operating system environments on each Apple-branded computer you own or control that is already running the Apple Software, for purposes of: (a) software development; (b) testing during software development; (c) using macOS Server; or (d) personal, non-commercial use.

Apple just really doesn't care about you, and as a developer, you're just a sucker to extract money from.

[judge2020]

Realistically you can run more than 2 VMs with some work[0], but legally companies that provide CI and other virtual solutions can't buy 1 mac then get a license to run 100 virtual macs.

0: https://khronokernel.com/macos/2023/08/08/AS-VM.html

[tesch1]

(insert name of any corporation ... listed on any stock market) just really doesn't care about you, and as a developer, you're just a sucker to extract money from.