I revived my iMac early 2006, 17 inch ( graphics processor problems with those early 2006 iMacs ). According to Micromat's Machine Profiler the minimum OS is 10.4.4 Tiger and the maximum is SnowLeopard 10.6.8. I have the install disk for SnowLeopard and the iMac works with SnowLeopard. I have the Tiger install DVD but it is only for Power PC. Do i have to buy Tiger intel version 10.4.4 ?