Ive done everything possible on my Mac computer, like safe mode. reinstalling. etc. But nothing seems to work it just stays on the grey screen with an apple logo and the loading circle. Please can any one help me with this problem?
Then you can use the Disc One DVD. To boot from the DVD:
Booting From An OS X Installer Disc
1. Insert OS X Installer Disc into the optical drive.
2. Restart the computer.
3. Immediately after the chime press and hold down the "C" key.
4. Release the key when the spinning gear below the dark gray Apple logo appears.
5. Wait for installer to finish loading.