Hello! I am new to the forum, but I have been using Logic Studio on and off for about 1.5 years. I recently switched to the 64 bit mode, but that doesn't seem to be relevant to this discussion because I get the problem on 32 or 64 bit mode. I am running into a new problem where a brand new project with only one plug in (tried EZDrummer and Guitar Rig 4 with exact same results) is getting skips and dropouts when in input monitoring or recording mode. Logic is showing the CPU maxing out, but when I look at the Activity Monitor, it seems to be at around 15-20%. I'm hoping somebody can help after all the tweaking and research I have done today. I have tried checking everything I can possibly think of. First, here are my computer stats. Model: 27-inch iMac, Mid-2010 Processor: 2.8 GHz Intel Core i5 OS: Lion 10.7.4 RAM: 8 GB 1333 MHz DDR3 (straight from Apple, not 3rd party) HD: 2TB, 1.25 TB free Audio Interface: M-Audio Fast Track (probably not applicable) Logic Version: 9.1.7 Sample Rate: 44.100 kHz So far, I have tried the following to resolve the problem: - Tried all different buffer settings from the lowest to the highest. Buffer size was set at 256 previously. - Tested my RAM using both Apple Hardware Test and Rember. No problems found with either test. - Ran Disk Utility on the hard drive. No problems found. - Made sure other unnecessary applications were closed. Verified RAM usage was low according to Activity Monitor. - Tried different DAWs. The same problem occurs with Reaper64. I do not have the problem with Reason 6.5. I didn't try it today, but I don't think I have the problem with Ableton Live 8 (which is 32-bit). I've read through dozens of forum postings, FAQs, old news, new news looking for a reason for the skips and dropouts, but I can't find an answer. If anyone can help, I would be very appreciative! I hope I've provided all of the relevant details.