Cursor disappears from external monitor hooked up via HDMI to dongle to Macbook Air

Hey there ipadfanman,

Let's rule out some possible causes to this happening by having you confirm the following details:

1. While we recommend testing an Apple-branded adapter with your Mac and HDMI cable, have you already tried one? This will help rule out the adapter as a possible cause.
2. We see you have macOS 10.5. The latest version for the one you have installed is macOS 10.5.8, but the latest version for compatible models is macOS 12.5. You can verify this by clicking on the Apple logo at the top left corner of the screen, then on ‘About This Mac’. Just in case, this link will show how to first back up, then Update macOS on Mac
3. In case there's a setting that's not set correctly regarding the resolution of your external monitor, check out the section 'Set the resolution for a connected display' here: Change your Mac display’s resolution

Cheers!

ipadfanman,

If the issue persists, we'd recommend contacting Apple Support directly for additional assistance.

See contact options here:

• Apple Support

Take care.