A couple of weeks ago, the wife and I purchased an iMac from our local Apple store. We took it home, unboxed it, ran through the setup as complete Apple newbies, and after migrating her email and music started noticing some strange things. The strange things took place only on cold boots, could not be explained during an Apple Genius appointment, led to an iMac swap. The swap unit was setup in the store with a couple of Apple employees watching, and the same issues arose. Employees couldn't explain it and advised to live with until solution is found or return for refund. We took the refund, left, and 2-3 days later discovered a discussion on Apple's discussion boards from July expressing the exact same issues. That discussion thread panned through a revelation that hopefully will be tested today during a 3rd and final attempt to buy our first Apple computer. Issue was that after initial setup, cold boots had Bluetooth's Discoverable option enabled. This cased the system to hang, and then fall back into Safe Mode. In safe mode no hardware video acceleration (experienced choppy video), no menu bar loading (had to be forced), 802.11 wireless was broke (Wi-Fi: No hardware installed), USB devices were not being auto-detected or auto-mounted, and software would not permanently install. All of the issues would disappear if one rebooted after a cold boot. Someone discovered that if you do not power up the Bluetooth KBM before hitting the iMac power button during cold boot the booting into Safe Mode would not happen. Someone also suggested turning off the Bluetooth Discoverable option. So, we will buy another 27 iMac (i7 3.4 GHz), do the initial setup in the store and test to see if disabling Discoverable works, or at the very least not powering up the Bluetooth KBM before the login screen appears. Any advice on what to do today during the store visit? ---------- BTW, the story of the issues can be found here. Cheers!