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Phew I'm even more glad I stayed on 12.2 now, hearing that being on the 12.4 beta is causing you issues with updating to 13.0Hope you figure out the snag, and get up and running!
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All you need to do is plug your device in, navigate to Finder, select your device in the left pane, then hold option while you click "Update" or "Check for Updates" -- finally, select the iOS 13 .ipsw and then you should be good to go.I also installed the Catalina profile first and ultimately, it was just a slightly different "skin" on a process that is the same as doing it through iTunes.I would have done the xcode 11 option, except for some reason, unpacking the installer was taking incredible amounts of time. I am unfortunately working on my backup device -- the 2014 mac mini (womp womp pls help) so it seems to struggle with unpacking lots of data. My catalina installation took a very long time, and so did unpacking the .ipsw while it was preparing it to install on my iPhone X.Phew. Almost at the finish line -- 5 hours later. A Profile would have been appreciated -- but I understand that this way, it makes it a little less accessible since the first developer beta is always a little less "stable" and they want to discourage copious amounts of "Average Users" from installing and running it.
They let us know that you’d be able to see your iPhone in finder like with iTunes, but they most certainly did not mention that you’d have to install the dev beta 1 using finder after upgrading to MacOS Catalina.
