In OS X it’s possible to change the highlight color. You can do this in the General ▸ Appearance panel in System Preferences. The Calendar application doesn’t use the highlight color for ‘Today’. This uses the default color blue, you can enable the system highlight color for the today selection with the following command.
Disable the rounded corners in QuickTime Player X
It’s possible to disable the rounded window corners while playing a movie in QuickTime, use the following command to disable them.
OS X Terminal: Activate focus follow
By default, mouse focus for Terminal is determined by clicking on the desired window, but it is often more convenient to have the focus automatically follow the mouse to any Terminal window.
Quicktime Player X: Enable auto-play feature
It’s possible to enable the auto-play feature for video files in Quicktime Player X. Use the following Terminal command:
Disable Dashboard in Mac OS X
It is possible to completely disable OS X Dashboard. On old Mac’s this could save some memory and cpu resources. Use the following command and kill the current running Dashboard.
Calendar: Change the amount of days in week view (10.8)
It is possible in Mountain Lion’s Calendar app to change the numbers of days displayed in the week view. If you want to display 14 days in the week view use this command:
Activate the default settings for OS X Launchpad
If you want to cleanup OS X Launchpad and restore to default you can use OS X Terminal. The command resets the Launchpad with the default content sorted on a to z basis.