When starting your Mac, if you run into a prohibitory sign and the system will not boot, there are a couple of things you can try to address the problem.
Some people have reported a problem where the computer will not save these settings, and will either revert back to another volume level or be set to mute.
To invoke boot options you hold down various key combinations at bootup; however, in some instances the computer may not recognize these key combinations at boot.
When Macs boot up, users have the option to provide key sequences for various boot options: reset PRAM, select boot volume, single-user mode, etc. However, some users may experience problems were
Some Macs may continually display a progress bar at the grey bootup screen, sometimes without issue but other times coupled with crashes and other problems.
New software will give you the option of starting Windows and wait--or booting Splashtop and be ready for action immediately.
Step 3: Learn how to accurately clock your PC's start-up time in this step.
Step 6: Not sure what some of the files on System Configuration Utility's Startup tab are? Find out how to decipher the mystery apps and whether you can safely remove them.
Step 7: Now that you've made some tweaks to your system, find out how much time you've shaved off your bootup.
Step 1: In this Weekend Project, Tom Merritt shows you how to reduce the time it takes your computer to get ready for action.