bogartpeanuts

Hi to all - I'm new to the forum. I'm having major problems with Logic and my i7 iMac since I have installed Mountain Lion. I use an Apogee Ensemble. I'm getting crackles and Pops even with the Buffer size set to 512. When I lower the buffer it's like listening to a freshly soaked bowl of Rice Crispies! I can still hear the occasional pop with the buffer set to 1024. I'm going crazy because I can't find a solution to this problem. I have an older Mac Book Pro with Lion installed and everything works perfect on it. The clicks and pops are audible while recording with the software monitoring on. On playback they are part of the recorded material. When monitoring through the ensemble directly, I can't hear them. I've tried using a different firewire cable, reinstalling maestro 2, rebooting several times. All is up to date... What else can I do??? Can someone help me? Please. Thanks,