Ideally, it's a continuous part of development because you're making daily (or more) builds and testing them.

That makes it a continuous headache to keep your Mac builders up.

It means you need to double dev hardware costs or more as you need a gaming PC to target your core audience and Macs handle the mac bugs.

It means your mac build machines are special snowflakes because you can't just use VMs.

The list goes on and on of Mac being actively hostile to the process.

Just Rider running on a Mac is pleasant sure, but that's not the issue.