The black boot selector on a Mac Professional 2007 is a typical difficulty that may stop the pc from beginning up correctly. This difficulty will be attributable to quite a lot of elements, together with a defective arduous drive, a corrupted working system, or an issue with the pc’s {hardware}.
There are a couple of alternative ways to repair a black boot selector on a Mac Professional 2007. One possibility is to strive resetting the PRAM. This may be finished by holding down the Command, Possibility, P, and R keys whereas the pc is beginning up. An alternative choice is to strive booting the pc into Secure Mode. This may be finished by holding down the Shift key whereas the pc is beginning up.