My iMac will not boot up. I have a 3 year old iMac running Lion. When I push the power button I get the Apple logo, then the circular thing made up of small lines revolving iin a clockwise direction, then a progress bar which never fills in.
The progress bar then disappears and the system never boots up. How can I get this machine to boot without a start-up disc?
Are there any keyboard shortcuts available?
iMAC, Mac OS X (10.4.10)
