I recently moved my 2009ish 2x2.8gHz 18gig ram Mac Pro home from work. it was working quite well there. Now at home I have encountered unbearable performance issues. Here are some symptoms: There is a 50% chance that my monitors won't come on at all. I will turn on the computer, hear the apple "bong" chime then nothing. I am able to engage capslock on my keyboard so I know something is functioning. If my monitors do come on...the typical boot time is roughly 7-10 minutes. I will see nothing until the grey/white screen comes on...then it is another couple minutes till I see the desktop. And each time I try to do a proper restart, I will never get the monitors to come back upon reboot. I will have to force off the machine then keep trying till they work again. EVERYTHING runs incredibly slow. The smallest function requires a long wait and a spinning pinwheel. Opening Safari will take about 3 minutes. System Preferences is about the same. And I tried to open Logic Studio but it is going on 20 minutes now and I don't think it's going to pull through. Here are some things I've tried to fix the problems: - Other monitors, graphic card, monitor power supplies, vga cables, vga to dvi adapters. - Resetting P/VRAM. - Running ONYX for cache, temp, etc files. - Manually deleting cache from library folder. - Disk Utility Verify and Repair Disk Permissions. - Disabling Spotlight by not allowing it to search any HD. - Removing all items from starting at login. - Selecting Start Up/Boot Drive HD in System Preferences. I can't remember too much of anything else I've tried so far. Nothing really goes over 5% on my activity monitor as I just perform simple tasks or at idle. It really wasn't doing this until a couple days ago when I installed new software for a piece of musical hardware. I noticed when it got down to "about one minute remaining" on the install...it was taking an unusually long amount of time. Well over several minutes. My specs are: Mac Pro 2x2.8 gHz. Lion 10.7.6 18 gigs of ram. 4 internal HD's. GEforce GTX 580. Dual Monitors (VGA to DVI connectors) Any help at all would be much appreciated!