There is no ark tab!

Development Modding ARK: Survival Evolved
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1

I can’t find the ark tab to install the dev kit.

2

If you’re referring to the Epic Games Launcher, the ARK tab won’t appear if you’re running any form of MacOS(possibly Linux too - not entirely sure on that one though). The DevKit is, I believe exclusively, only able to run on Windows x64-bit.

-WM