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Mac OS X - keyboard shortcuts on startup

If you want to use functions described below just hold down key or keys' combination when your computer is starting.

If key(s) function don't work it can mean that you don't have genuine Apple's keyboard

Start in verbose mode
 

COMMAND
+
V

 


 

COMMAND
+
S

 


Boot from CD or DVD
C

 


Display start manager (all bootable devices/systems)
 

OPTION

 


Start in (safe mode)
 

SHIFT

 


Mac memory test.How to test your Mac OS X RAM?

Has your Mac OS X system crashed many times? Have you had problems with running applications? If your answer is 'yes' - probably you have some troubles with your Mac RAM memory sticks. There are some methods to test memory modules. You should do Mac memory check! I will show you how to do your Mac memory test.