Using the the F3-key should normally activate Exposè/Mission Control. In some circumstances nothing happens when you hit the F3-key or the four finger up gesture.
To solve this problem apply the following defaults write command:
10.10
Display the file extensions in Finder
File extensions (.jpg, .txt, .pdf, etc) are normally hidden by default in OS X. You can either set all extensions to be displayed through the following command:
Enable a larger Dock Icon size than default
Through the system preferences you can adjust the size of the Dock icons. Unfortunately, you can’t go larger than 256 pixels. With the following command you can change the size in different sizes.
Enable Reminders debug menu and force a manual update
Some of the built-in macOS applications have the possibility to activate a ‘special’ debug menu. One of these applications is Reminders, the debug menu gives you the option to manually Update/Refresh with your iCloud account.
Quit the Reminders application and start a Terminal window, apply the following command:
Use plain text as default format in TextEdit
TextEdit is a simple application for quickly writing text and notes. The text can be edited in RTF (Rich Text Format) mode, as well as plain text. With the following defaults write command you can enable plain text as default format in TextEdit.
Sync iCloud history and bookmarks manually (Safari)
The Safari browser on your Mac en other Apple devices can sometime go out of sync. Bookmarks, open tabs and history will not synchronized with other Apple devices. It’s possible to force synchronize the bookmarks and other iCloud content manually, this can be done with Safari Debug menu. You must activate this menu with the following Terminal command.
Add a blank space to the Dock
Did you know that you can customize the Dock in OS X through terminal? With the following defaults write you can add a blank space to the Dock. This is a better way to organize applications.