Have opened up projects in both 32 bit and 64 bit mode (but only 32 bit kernel as my mac pro is too old for 64 bit kernel).
Projects in 64 bit mode spike the CPU meter, and result in clicks and pops during playing.
Quit Logic, change to 32 bit mode, reopen same project. CPU meter reading lower, no clicks and pops on playback.
Now its an older machine (Mac Pro 1,1) and I am also running Vienna Ensemble Pro with a 9 GB template loaded up, but not connected to these projects I am opening, naturally this is taking resources.
Anyone else notice similar results, that the 64 bit mode causes projects to use more CPU?