First! Know which OS (Operating System you are using) 1. Go to the Apple Menu 2. Go to About this Mac 3. Look for your OS 12 Monterey, 13 Ventura, 14 Sonoma, 15 Sequoia (newest) Look at the list of all the Macintosh OS systems in order - https://setapp.com/how-to/full-list-of-all-macos-versions (click your version and look at the features your system has that you might want to explore) Dive into your OS and learn more about what you can do. Choose the User Guide for you OS 15 Sequoia - https://support.apple.com/guide/mac-help/welcome/mac 14 Sonoma - https://support.apple.com/guide/mac-help/welcome/14.0/mac/14.0 13 Ventura - https://support.apple.com/guide/mac-help/welcome/13.0/mac/13.0 12 Monterey - https://support.apple.com/guide/mac-help/welcome/12.0/mac/12.0 Exploring some of the features and functions of Sonoma OS 14 More choices for changing the Login Screen, Screensaver and background picture. 1. Click the Apple Menu 2. Choose System Prefe...