To split screen on a Mac, follow these steps:

1. Open the two apps or windows you want to use side by side.
2. In one app window, hover your cursor over the green full-screen button in the top-left corner. Hold the pointer there until a menu appears.
3. From the menu, select either "Tile Window to Left of Screen" or "Tile Window to Right of Screen" depending on which side you want the app to occupy.
4. On the other side of the screen, click the second app or window you want to use in split view. It will fill the other half of the screen.
5. You can adjust the split by dragging the vertical divider between the two windows to resize them as needed.
6. To exit split screen, hover over the green button again and select "Exit Full Screen" or press the Escape key.

This creates a Split View in a new desktop space, allowing you to work in two apps side by side efficiently

. Additional tips:

• You can also enter Split View using Mission Control by dragging one app window onto the thumbnail of a full-screen app.
• To switch apps within Split View, hover over the green button and select "Replace Tiled Window" to choose a different app.
• Swipe left or right with three or four fingers on the trackpad to switch between Split View spaces

This method works on macOS Catalina and later versions, and similar steps apply to recent macOS releases