Just some contextual info about this + the massive OSX cpu use issue.
Reaper 3.53pre4 - 30 tracks @ 48k ---- hovering around 80% cpu
- GUI very sluggish
- Audio glitching and drop-outs - ie not useable
Logic 8 - same 30 tracks @48k ------- hovering around 35% cpu
- GUI just as responsive as ever
- flawless audio - no problems
Cpu checked in Activity Monitor with no other apps open at the time. Reaper cpu was roughly the same as shown in Activity Monitor, the Logic cpu meter showed no bars at all, just some periodic tiny spikes on the HD meter, which is totally expected when playing 30 tracks.
No plugins in either project, buffer sizes in both apps was 1024, same audio files, same audio interface and same results on built-in speakers. No competition really. Despite the great editing in Reaper, unless I switch to windows or the OSX issues are confirmed by devs and addressed I don't think I'll be using Reaper
sorry guys