Use Switch Control to interact with your Mac

In macOS Ventura or later:

1. Choose Apple menu  > System Settings.
2. Click Accessibility in the sidebar.
3. To view Switch Control settings, click Switch Control on the right.
4. Turn on Switch Control.

In earlier versions of macOS:

1. Choose Apple menu  > System Preferences, then click Accessibility.
2. To view Switch Control settings, select Switch Control in the sidebar.
   
3. From the General tab, select Enable Switch Control.

When you turn on Switch Control, the Home panel appears onscreen:

To cycle through items in the Home panel, press a switch, such as your mouse button or the Space bar. Press the switch a second time to select the highlighted item. If you want to use other devices to control your Mac, select “Allow platform switching to control your computer” in Switch Control settings.

Use Switch Control settings to set up switches that perform an action when pressed. You can use a mouse, keyboard, or dedicated switch hardware connected via USB or Bluetooth. You can also change existing switch actions.

By default, the Space bar is used as a swith.

• To add a switch, click the add button (+) in the Switches section, then press your adaptive switch. Enter a name, then select an action such as Stop Scanning. To have the switch run a script or open an app, click Custom, then choose the script or app.
• To remove a switch, select a switch in the Switches section, then click the remove button (–).
• To change the behavior of an existing switch, select a switch in the list, click the more button or , then change the name or action. To use a different switch for the action, click Reassign.

Scan items
When you press the Select Item switch, Switch Control begins stepping through a panel, group, or user interface. Switch control highlights each item or group as it scans. The scan pauses when you select an item, unless you've set the option to keep scanning after a selection is set. If you turned off auto scanning, press the Move To Next Item switch to advance the scan. Switch Control repeats or loops a scan as set in the Navigation pane.

Select an item
When an item is highlighted, press the Select Item switch. If the selected item is a group, and you didn’t set the option to resume scanning after a selection, press the switch to scan the group. Then press the switch to select an item in the group.

To exit a group, press the switch when the group is highlighted or when you hear “step out.”

If you need to use the pointer to click an item that isn't part of an app's interface, you can use Pointer mode to scan the screen and click an item.

1. Click to begin scanning horizontally.
2. When the range finder highlights the area you want to click, click your switch again.
3. Click another time to precisely refine your horizontal position. 
4. Click to start the vertical range finder scan.
5. Click again to refine your vertical position. 
6. Click your switch a final time to click the onscreen element that is under the blue crosshair.

Set panel options
In a panel, click the Select Item switch when the Panel Options icon  or  in the upper-right corner is highlighted. Then click the switch again when the option you want to set is highlighted. You can decrease or increase the size of the panel, and increase or decrease its transparency.

Return to the Home panel
In a panel, click the Select Item switch when the Home icon in the upper-right corner is highlighted. In the interface, press the switch when the Home panel is highlighted.

Keyboard
Type text in a document or field by scanning the keyboard in the panel, opening a group of keys, and then selecting a key. The first group contains suggested words based on the first keys you press. This lets you save typing time by selecting a suggested word. Other keyboards might be available in the Custom panel.

Pointer
To move the pointer to an area of the screen, select Move. A vertical block starts to glide across the screen. When you press the Select Item switch, the block stops and a vertical blue line starts to glide across the block. Press the switch again to either stop the blue line or substantially slow it down before you press the switch again to stop it, based on the setting of Gliding Cursor Precision in the Navigation pane. When you do the same horizontally, you see the pointer move to the intersection of the two blue lines.

App
Scan items and groups in the active window of the current app.

Dock
Immediately start scanning just the items in the Dock.

Menu Bar
Scan the menu bar group, then the menu extras group.

System
Control the volume or display brightness of your Mac, and control media playback.

Custom
You can create custom panels in the Accessibility pane of System Preferences. Select Switch Control, then click Open Panel Editor. Any custom panels you create appear here. 

Location
Use this option to reposition the Switch Control Home panel on the screen.

To further customize Switch Control, use the Navigation options in Switch Control settings. You can learn more about Switch Control and the Switch Control Panel Editor from the Apple Accessibility website and from the built-in help included with your Mac.