On a Mac that would likely be
Audirvana, $75 and you own it.
There are too many variables and even just single end user preferences to consider with regard to making any easy direct comparisons, I'd suggest using a trial version first to see if you like the UI and the setup/config. The sound is fantastic, many feel the best available sonically for macOS (and that would include Roon).
Another slightly less expensive option for macOS is JRiver, $59, a little more complicated to setup but once finished it is set and forget, there is no constant messing with it. Also great sounding, but seems to lack that last bit or certain something with regard to musicality, as compared to Audirvana. YMMV.
Both Audirvana and JRiver are fine longstanding choices for the macOS, neither is as polished looking as Roon, but that never really bothered me much as I don't necessarily need to look at extensive metadata or the UI, or get additional recommendations based on what I'm currently listening to. All nice to have, but not at all critical in my case for listening enjoyment. Again, YMMV.
Lastly, on the cheap you can turbo charge iTunes itself with the
BitPerfect plugin at $10. This too sounds great, but lacks many of the features of Audirvana and JRiver. Not clear to me where that one is going with regard to Apple's official dismemberment of iTunes in favor of various separate apps, I do not know if BitPerfect is compatible with the newer "Music" app that took iTunes place as a music player. Low risk to try it though, that was my very first hi-rez audio player for macOS, and if that's all I ever had to this day, I'd still be in good shape. If you require DSD playback that's a $29 add-on called
DSD Master not included in the $10 for BitPerfect itself.
My pick is Audirvana, however a friend of mine in CA (who is a lifetime Roon subscriber) keeps
Vox Music Player as his fall back for macOS, I've never used it but I trust his judgment, if he kept it on his machine that means it must be really good.