| Option + double click on folder = closes the window the folder resides |
| Option + click on desktop or other application = hides the current application after switch |
| Option + click on the date = turns clock on and off |
| Option + about this Macintosh = about the finder |
| Option + empty trash = trashes locked items without asking |
| Option + window shade = window shade all open windows |
| Option + collapse window = collapses all windows |
| Option + save = saves all |
| Option + print = print all |
| Option + double click on connected user in file sharing monitor = send message |
| Option + dragging item to another directory or desktop = copy to new location |
| Option + resize window box = full screen view |
| Option + eject = eject and leave behind |
| Option + arrow keys + desktop picture control panel = Moves desktop picture |
| Option + number keys = Highlight the last alphabetical item |
| Option + Command + Escape = Force Quit |
| Option + Command at Start up = Rebuilds Desktop |
| Option + Command + P + R at Start up = Zaps the PRAM |
| Option + Command + Shift + Delete at Start up = Forces start up drive to go off-line and start up off another drive with blessed system |
| Option + Command + Tab as inserting disk = Initializing Disk |
| Option + Command + Tab = Erase floppy |
| Option + at start up = Closes all Finder windows |
| Option + Command + Open Chooser = clears Chooser cache |
| Option + click Expand box = Expands window full screen |
Option + Command + Power = Force Sleep Thanks Jason A. for this one |
Option + Command + Power + Shift = Force Shutdown Thanks Jason A. for this one |
Option + Command + Memory Control Panel = Startup Memory Test Option Thanks Ken T. for this one |
Option + Command + Control + Shift + Apple Menu = About MacOS Team Thanks Ken T. for this one |
| Option + space bar = non breaking words (when typing) |