I just bought my first mac today, the 2.16 GHz MB, and after a half hour it's already giving me troubles. I have an external hard drive that I had been using with my PC, it's an EZQUEST B30463 Monsoon 300 gig drive. When I connected it to the mac, the screen went dark and a prompt told me I need to restart the computer. I do that, the little apple appears in the screen, then it goes dark again with the same restart prompt. I've restarted it at least 10 times, but there's no sign of it stopping that prompt. In the top left corner, in code text, it says panic(cpu 0 caller 0x003AA8F7): Unable to find driver for this platform: "ACPI". Debugger called <panic> Bactrace, Format - Frame : Return Address (4 potential args on stack) [Lots of numbers, like 7 rows of them] Kernel version: Darwin Kernel Version 8.9.3: Fri Apr 27 14:50:07 PDT 2007; root:xnu-792.19.5~2/RELEASE_I386 I continue to restart, and the same screen comes up. I'm guessing that my external HD is not compatible with the MB, even though the genius at the store told me it would work 100%. So what should I do to get around this? This isn't looking like a good beginning for my relationship with Apple!