In defense of Macs, I'm running Roon on a Mid 2011 Mac Mini. I upgraded the RAM to 8GB and installed an SSD, both of which were quite cheap upgrades.
There are a number of utilities that you can run on a Mac to stop it sleeping. I use Caffeine.

I also use this Mac as a Plex Server and it's fine for that as well.

There are some quite cost effective alternatives if you don't want to spend a lot of money!

It's just an alternative perspective.

Cheers
Greg

M owner since '97