Mac shortcuts:
1. Command + delete: delete files
2. Shift + Command + delete: Empty the trash
3. Command + A: Select all
4. Ctrl + Command + F: Open/close application full screen
5. Command + space: switch input method
6. Command + [ or ] in Finder: Back or Forward
7. Command + space: open Spotlight search
8. Shift + Command + 3: Take a full screen shot and save it on the desktop
9. Shift + Command + 4 (+ space): Free range screenshot (selected window screenshot) and save it on the desktop
10. Command + Q: Exit the program
11. Command + W: Close the program, but it is still running in the background
12. Command + M: Minimize the application in the Dock
13. Command + tab: switch applications
14. Command + H: hide the application and save it in the second place in the background
15. Long press the green full-screen button in the upper left corner of the application to enter split-screen multitasking