If you have an old Intel Mac, Linux works just fine. I resurrected a 2013 MacBook Air this way, the machine runs really well with Linux Mint, I think any modern Linux distro will work on it.
For ARM64 Macs … maybe Asahi Linux (seems to work on M1 and M2 Macs), but clearly the system is less open than before. Also, if you have an M3/M4 you are currently out of luck if you want to install Linux directly on the device.