Brand new install ue5.5 on MacBook Pro M4 Max 128GB. Same sign-in creds at unrealengine.com works fine in web, but I’ve been unable to start ue5.5 at all: I get sign in failed err AS-3. I searched knowledge base link, then other forum posts, but did not find AS-3 error.
Hey there @uQuantum! Welcome to the community! The AS - 3 error is a sign on error specifically, which can usually stem from a network firewall blocking the application, a VPN, or a permissions issue. Most of these are uncommon on a Mac.
Thanks @SupportiveEntity for suggesting it’s an unusual error on macbook. I noted the lack of other people with same error. I think it boiled down to not having Xcode installed before, but I did have xcode tools, and perhaps that confused unreal engine.
My fix was: homebrew install mas, then: mas install Xcode <you actually use the id, not the word 'Xcode" from the list>, then, accepting the Xcode license agreement.
Once I did all these things, it got past that error, and I got the editor open.
Hope this helps any others who get a similar error on new macbook, and like me, had Xtools installed, but not Xcode editor.
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