Tips, Short Cuts, and Hidden Features


The Mac Cats

Mac OS X 10.0: Cheetah (March 24, 2001)

Mac OS X 10.1: Puma (September 25, 2001)

Mac OS X 10.2: Jaguar (August 23, 2002)

Mac OS X 10.3: Panther (October 24, 2003)

Mac OS X 10.4: Tiger (April 29, 2005)

Mac OS X 10.5: Leopard (October 26, 2007)

Mac OS X 10.6: Snow Leopard (August 28, 2009)

Mac OS X 10.7: Lion (July, 2011)

OS X 10.8: Mountain Lion (July 25, 2012)



TechTool Pro Key Commands

cmd-?: TechTool Pro Help

cmd-H: Hide TechTool Pro

cmd-Q: Quit TechTool Pro

cmd-1: Select the Tests category

cmd-2: Select the Tools category

cmd-3: Select the Reports category

Useful Apple Key Combinations

cmd-opt-P-R at startup: zap PRAM

opt at startup: select startup device

cmd-S at startup: boot into single user mode

cmd-V at startup: boot using verbose mode

shift at startup: boot into safe mode

shift at login: bypass user startup items

cmd-opt-O-F at startup: drop into open firmware on PowerPC Macs

cmd-D at startup: start up in Apple Hardware Test if Install DVD 1 is in the drive

cmd-T: start up in FireWire Target Disk mode


Basic Open Firmware Commands

(PowerPC Macs)




eject cd

dir hd:\

dir hd:\



Handy Terminal Commands (for Geeks only)

sudo diskutil enableJournal /: Enables journaling.

sudo diskutil disableJournal /: Disables journaling.

sudo sh /etc/daily: Runs the daily system cleanup tasks.

sudo sh /etc/weekly: Runs the weekly system cleanup tasks.

sudo sh /etc/monthly: Runs the monthly system cleanup tasks.

pwd: Displays the path name of the current working directory.

cal: Displays a calendar for the current month.

cd: With no argument changes the working directory to the user's directory. When followed by a directory name it changes the working directory to the specified directory.

ls: Lists the current directory's files.

ls –a: Lists all files, including invisible files.

ls –l: Includes more information in the listing.

rm: When followed by a file name deletes the file.

rm –r: When followed by a directory name removes the directory and all its subdirectories (be very careful, this is a dangerous command).

rmdir: Removes an empty directory.

top: Provides a live display of currently running processes (type "q" to quit).

sudo: Followed by a command, allows you to execute a single command as root.

kill: Followed by a process ID, terminates that process.