The following command will show the cover flow frame rate (as frames per second) within the Finder alongside each filename when flipping through files.
Save to disk (not to iCloud) by default
OS X Mountain Lion changes the default save location for applications. Any app which support iCloud now displays the iCloud dialog as default when saving a document. With this default write command you can revert to ‘local hard disk’ as default location for saving documents.
Disable ‘Eject’ menu option in OS X Finder
Disable the menu option: ‘File ▸ Eject [volume]’ (cmd⌘ + E) in the Mac OS X Finder menubar.
Enable the debug menu in Disk Utility
OS X Disk Utility has a hidden debug-menu that, when enabled, can give you access to more advanced Disk Utility features. The debug-menu gives you access to the restore partition (OS X 10.7 and above). The ‘Debug’ option will appear after applying this command in OS X Terminal:
Enable the 2D Dock
If the 3D Dock isn’t your taste, you can use Terminal to switch to the 2D visual implementation.
Enable the secret settings in Twitter for OS X
The Twitter for Mac OS X application has a secret preferences tab. This gives you access to options like: Show full names, Compose windows float over all windows, type anywhere and munch more.
Enable hidden Stacks list view in OS X Dock
This terminal tweak will enable a hidden list view for your stacks that is way better then the default one that comes with OS X. Enable hidden Stacks list view with the following command: