use another computer as a second monitor mac

With Apple and Windows historically living in such separate camps, it's nice to see a product bring more platform agnosticism for those who aren't completely committed to one side. And plug the other end of the cable to Mini Display Port or Thunderbolt port into your iMac. Plug one end of the cable into the HDMI, Display Port, or the Thunderbolt port on your Windows PC or laptop. The iPad must run iOS 12.1 or later, and you need either 802.11n Wi-Fi or an Ethernet connection. Then, you need to connect them together with a Thunderbolt cable. Install ScreenRecycler on the MacBook Air (the Mac you want to project to the other Mac). Note that to use Luna Display in general, you must have a system with Windows 10 64-bit, Build 1809 or later, or macOS 10.11 El Capitan or later as your main PC. It works this way: Make sure that both Macs are on the same network.

Again, this feature works whether the iPad is connected to a Mac or PC. Other additions with the Luna Display 5.1 update include support for Apple's Magic Keyboard and trackpad with a Luna Display-connected iPad.

And if you're 'only' connecting a 4K screen, your refresh rate will be 60 Hz, whether the display is connected to a Windows or Apple system. If you're using a Mac with Big Sur or later, the refresh rate is increased to 45 Hz. Any 5K screen connected to your Windows PC will be limited to a 30 Hz refresh rate, which is half the refreshes per second than what's typical (60 Hz). If you plan to connect a 4K or 5K Mac, the machine has to be running at least macOS Big Sur.

Use another computer as a second monitor mac