How to check which version you are using - and also update your Operating System (OS).
Stacks is a feature that automatically sorts your desktop files by type, literally "Stacking" them on top of each other. By clicking on a stack it will expand those file types.
New Preview - when you have highlighted an image, simply tap the space bar to open a preview, from here you can select editing (markup) options and more.
Make it easier on your eyes in low light..
Set your desktop to adjust to reflect the time of day...
On your desktop, right-click empty space and choose a desired option under Import from iPhone. Your selected device’s camera will open and after you’ve taken your desired photo, select Use Photo.
Tapping; ⌘ + Shift + 5: Brings up the screen shot menu, where you can choose to take a picture or record a video, where to save the file, timers and more.. check it out!
By pressing certain key combinations, you can do things that normally need a mouse, trackpad, or other input device.
To use a keyboard shortcut, press and hold one or more modifier keys and then press the last key of the shortcut. For example, to use Command-C (copy), press and hold the Command key, then the C key, then release both keys. Mac menus and keyboards often use symbols for certain keys, including modifier keys:
example: control + command + space - will open an insert characters window
On keyboards made for Windows PCs, use the Alt key instead of Option, and the Windows logo key instead of Command.
Some keys on some Apple keyboards have special symbols and functions, such as for display brightness , keyboard brightness , Mission Control, and more. If these functions aren't available on your keyboard, you might be able to reproduce some of them by creating your own keyboard shortcuts. To use these keys as F1, F2, F3, or other standard function keys, combine them with the Fn key.
You might need to press and hold some of these shortcuts for slightly longer than other shortcuts. This helps you avoid using them unintentionally.
The behavior of these shortcuts may vary with the app you're using.