![]() For systems that shipped with Lion, restart with the Command-R keys held down to load the recovery partition. In Snow Leopard and earlier versions of OS X, Apple included a boot disc with its systems, which you can boot to by inserting into an optical drive and restarting the system while holding the C key down (optionally you can select the disc as the boot drive in the Startup Disk system preferences). Therefore, if possible, follow these instructions to format and set up OS X again: While it may be enticing to keep application installations and other items on the system, running someone else's system setup can sometimes lead to problems down the road. The best option for any used system is to format it and start fresh, even if the previous owner claims this was done. Either way, the system is someone else's setup, which can include applications and configurations you may not want. Perhaps to make things easier they might create a new account for you, or change their passwords to their old account and given that to you. ![]() ![]() While owners selling a used Mac ought to format the system and include any restoration discs that came with it, sometimes this is not the case they simply handed it over, with all their applications and settings still intact. When you purchase a new Mac, the system is set up to introduce you to OS X and accept new account information to start you off however, if you purchase a used Mac then this may not be the case.
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