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.
iTunes: Disable access to Podcasts
Disable the Podcast functionality within iTunes. After applying this command the options will disappear in the navigation bar (Store section) and all other menu options within iTunes v7.1 and above.