Can't Launch 4.26 on Mac 10.14

Development Platform & Builds
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1

I’ve installed version 4.26 and I can’t get it to open. I’m running macOS 10.14 and I have 4.19, 4.22, and 4.23 installed which launch just fine. I’m not getting any error message or crash report pop-up, but when I open the the epic games launcher logs I get this error.

[2020.12.07-23.56.43:330][800]LogBuildNotificationToastHandler: Error: Format for DateTime incorrect in DisplayCondition Before({DateTime}). Datetime must follow Iso8601 format.

Thanks

2

I have a similar issue. UE 4.26.2 won’t launch on Mac OS 10.14.2 When you click the Launch Unreal Engine button from the Epic Game Launcher, it just closes the window.