Nothing is more annoying that Photos will opens automatically when you connect an iPhone, iPad or other devices to your Mac. Use the following command in Terminal to change this and prevent Photos from opening automatically.
10.11
Adding ‘Quit’ option to Finder on a Mac
Did you know you can add the Quit option to the Finder’s application menu? This allows you to easily quit the application. After quitting you can restart Finder by clicking on the Finder icon in the Dock.
Show one application at a time
In macOS and OS X it’s possible to show one application at a time. You can enable a ‘single application’ mode by entering the following command in Terminal:
Speed up Time Machine backups
Time Machine backups are great, but very slow when a large amount of data/files needs to be transferred (such as the initial back-up). As desgined by Apple the Time Machine background proces is running in a very low CPU priority, giving all other running applications en services priority.
Enable the expand save panel by default
Sometimes it can happen when saving a document that you have to click first on the triangle next to the Location field to open the expanded save window. This can be very confusing, with the following command you can enable the expand save panel by default.
Stop the power button from putting your Mac in stand-by (sleep) mode
Since OS X 10.9 mavericks, the behavior of the power button has been changed. When you press the power button for about 2 seconds, it will put macOS (OS X) in stand-by (sleep) mode.
With the following command you can use the power button function as in previous versions of OS X. By showing a dialog box for turning off the Mac and more.
Reset OS X/macOS Dock to default settings
There is a Terminal command that you can use to quickly make your dock look like new again. Do you experience problems with the Dock on your Mac? The best you can do is to reset it to default settings.
The following Terminal command will reset your dock by removing any icons that you’ve added and removed. It’ll also reset the size of the dock, magnification settings, and its location.