@Donald_Libasci_RACER
Noooo. Would you verify? If that’s true, the end of the road for that machine as a Zwift computer is coming in a few months. macOS Sierra and High Sierra will no longer be supported as of August 1, and precisely because game developers struggle to overcome crashes with old OS versions that have been end-of-lifed by Apple, Microsoft, and Google.
Zwift runs on iOS / macOS / AppleTV / Windows / Android. Would you have another, more recent device you can use instead?