I recently purchased a used 2007 MacBook Pro 13". I was informed that the hard drive had been formatted in a system recovery for me. When I turn my computer on, its just a page called OS X Utilities. I have the option to Restore From Time Machine, Reinstall OS X, Get Help Online, & Disk Utility. When I chose to select Reinstall OS X, and enter in my Apple ID, it informs me that I have not purchased OS X on this account. How do I purchase and install OS X on this computer? Is there a way I can put it on a USB and install it from there? Any help would be greatly appreciated. Apologies if this has already been answered.