Recently Apple released an update to their current lineup of iOS devices. Among the features, the update brought including overall system stability and an increased level privacy, was the much-hyped Battery Heath monitor that would tell you if your device is being slowed down. There was so much excitement, in fact, that, most users of other Apple products missed the new macOS update to High Sierra.

The latest update for High Sierra, macOS 10.13.4, focuses on stability, performance and security, and brings official support for external GPUs. Users of Duet Display should take heed with the update, as it breaks compatibility. Duet themselves announced that a bug in Apple’s update blocks the software from working.

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For those who are not aware, external GPUs can provide a significant performance increase for graphics-intensive applications over the internal graphics processor inside most Macbooks Pros. External GPUs are able to accelerate apps that use Metal, OpenGL. and OpenCL; applications like Capture One, Affinity, Photoshop, Lightroom, DaVinci Resolve and Final Cut Pro X. What is definitely interesting is that the Apple-branded machines can support multiple eGPUs simultaneously, which opens up a slew of possibilities.

Apple has published a new document to help users with eGPU support and which hardware supports this feature. Mac computers that have Thunderbolt 3 are supported. Machines with Thunderbolt 2 and Thunderbolt will not support eGPU enclosures. 13-inch MacBook Pro users. Below is a list of supported Macs.

  • 2016 MacBook Pro
  • 2017 MacBook Pro
  • 2017 4K iMac
  • 2017 5K iMac
  • 2017 iMac Pro

Duet doesn’t have a solution or work around at the moment, instead suggesting that you stick with macOS 10.13.3 until a fix is available.