I can't sign into iMessage or facetime on my Mac at all ive tried many things and made sure my Mac is updated and it still won't work.

Hi dgarciaz,

welcome to the Apple (user-to-user) Community!

Re: "I've had my Mac for a while now and have never been able to sign into iMessages or FaceTime, I "log" in

and seconds after it kicks me out and gos back into the sign in page".

Had that happen to me during use of an earlier MacOS version : Restarting Mac always worked for me then.

Although you have tried many things, we have no idea of what you may or may not have tried.

They may be obvious, yet it is easy to overlook that one necessary thing: Wondering if you have tried:

Restarting your Mac

Checking you have a strong enough wi-fi set up / working:

Signing in (to your Mac) with your Apple ID: Sign in with your Apple ID - Apple Support

Ensuring your camera and microphone are both working ok

If you also use cellular data: FaceTime phone call requirements - Apple Support

Checking through Apple Support's online articles:

FaceTime requirements on Mac - Apple Support

Set-up info: Sign in to or out of FaceTime on Mac - Apple Support

Add or remove your phone number in Messages or FaceTime - Apple Support

What to do: If you can't sign in to your iMessage account or FaceTime on your Mac - Apple Support

and

If FaceTime isn't working on your Mac - Apple Support

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Resource: FaceTime User Guide for Mac - Apple Support

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FaceTime Support website (info. / support / contact options (online chat / phone / email etc):

FaceTime - Official Apple Support

All the best :-)