To activate dark mode in OS X Yosemite you have to take many steps, Apple doesn’t made it possible to activate dark mode with a hotkey. You can activate itself with the following command. Launch Terminal and enter the following command.
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Disable ‘Stay on front’ for OSX help windows
When opening the help window in OS X, the window will always open and stays on the front. This can be very frustrating, so you can use the following command in Terminal to get the help-center window behave like all other windows in OS X.
How to enable OS X Yosemite’s new dark mode (beta version)
Apple announced OS X 10.10 Yosemite earlier this month at WWDC with a whole new light and flat design. They also announced a new “Dark Mode” that’ll make the interface little bit darker. The setting was however not available in the first beta of OS X Yosemite, but you can enable it in the second beta with the following command:
10.9: Disable App Nap in OS X
App Nap helps you save power and battery life when you’re working with multiple apps at the same time. You can disable this feature for each application by using the info window in the Finder (select the app in Finder and activate this window with cmd⌘ + i). With the following command you can disable App Nap system wide.
10.9: Stop the power button from putting your mac in stand-by (sleep) mode (archive)
Since OS X 10.9 mavericks, the behavior of the power button has changed. Now, when you quickly press this button, it will OS X be placed in standby mode. With the following command you can use the power button function rollback to previous versions of OS X.
E-mail photos from iPhoto with the mail application
When you send an image from iPhoto through an email, you can do this with the built-in mail function. Here you must use the email templates. With the following command you can disable this behavior and send pictures through the mail application and immediately create a new message.
Disable the Mission Control zoom effect in Mac OS X
Turn off Mission Control’s zoom effect that appear whenever it’s activated or deactivated in OS X 10.7 and above.