AstroHQ’s Luna Display dongle can transform one Mac into a secondary display for another Mac. This is similar to what Apple’s Target Display Mode does, but that feature works only with iMacs of a ...

Read: How to Speed Up an Older iMac In any case, if you happen to have a spare iMac lying around and need a second display, here’s how to use an iMac as a second monitor.

You have an old iMac that has a perfectly good display. Wouldn't it be great if you could use it as a second monitor with your new MacBook Air. You can, but you may be underwhelmed by the results.

I'm using a 2010 27" iMac in Target Display Mode at the moment. Makes for a power hungry monitor, but it's more than good enough until I can replace it with a real one.

The Luna Display is a way of using an iPad or MacBook as a second display for your main Mac or Windows PC.

The Luna device pretends to be a physical display attached to the Mac (hence why the device comes in two versions, Mini DisplayPort and USB-C – standards typically used for connecting displays) while, ...

Luna Display’s latest software update adds support for using a Mac desktop or laptop as a second display for a Windows PC, making it perfect for extending a Windows computer to an M1 iMac.

Astro HQ’s Luna Display dongle for the Mac turns an iPad into a secondary monitor via Lightning or Wi-Fi. Others have pulled off such an iPad-as-Mac-screen maneuver using software, but Luna’s hardware ...

Determine Your Second Monitor's Connectors If you haven't purchased a monitor y_et_, you may want to look at your iMac's display ports before you buy a Mac dual monitor.