First of all, it is strange that when you replied my message, I didn't see it as NEW MESSAGE when I logged in? Is this normal, or this is not a message to me but a Forum Post? Just curious.
Secondly, no I am using Mac OS X.6.8 with 2 Dual Core Intel Xenon each with 3Ghz speed. The memory is 9GB 667 Mhz DDR2 FB-DIMM.. And yes the CPU is set as 99% as you mentioned. The CPU warning from Protools appear randomly, sometimes it does sometimes not at all
I tried even to load a drum programme or a drum loop from Spark onto Protools 10 when I open a Instrument track, sometimes it work sometimes it freeze or like jumping a stylus on vinyl... My friend who is using a Macbook Pro also have the same problem randomly... it is just not stable enough... I am also using the version 1.4
I also have another question, is it possible to load and record any drum loop from the Spark onto Protools as a Midi file track so that I can change or alter the drum pattern or sound later? I only know how to do it with Audio track on Protools but not as Midi track.