An aspiring iOS developer myself, I bought 2 books for programming in iOS 14 / Swift 5.3 based on good reviews on prior versions. Then, based on someone's recommendation I also bought a highly-rated udemy course for iOS 13 / Swift 5 because it was on sale for $15 with a money-back guarantee so thought I had nothing to lose. The books I bought: "iOS 14 Programming Fundamentals with Swift" and "Programming iOS 14" by Matt Neuburg The udemy course I bought: "iOS 13 & Swift 5 - The Complete iOS App Development Bootcamp" by Dr. Angela Yu Maybe other aspiring developers will also find the above useful. Now, a question I have which I believe can also help other aspiring developers, and which I ask especially to those with programming knowledge/experience in all of iOS 13, 14, Swift 5 to 5.3: are there enough differences between iOS 13-14 and Swift 5-5.3 to warrant skipping the udemy course (or any other course/material on the older versions, with regards to anyone who has learning materials for these different versions)? Or is mostly everything important the same so it may still be worthwhile?

If you already have Xcode installed and it's taking up a lot of space, removing it first may help bring the available space over the threshold.

That being said, this time it kept freezing when attempting to download/install 12.1 via the App Store, although there was enough space. However, downloading/installing via https://developer.apple.com/download/more/, as previously linked, worked. It doesn't need to be to/from an external drive if there is enough space.

I took a few Java university courses over a decade ago and have on/off experience with webdev languages like PHP, so leaning toward beginner. I've been reading the Neuburg "Fundamentals" book which so far is quite clear, and have also been perusing the Udemy, Stanford and Hacking with Swift courses, as I believe in learning by doing and will determine which best suits me at the current time. I've also heard good things about Apple's resource so thanks for the suggestion.

Same issue after updating to Big Sur. Before that update, Simulator 12.1 hadn't caused this issue for me. Disabling Siri & Search in iOS settings didn't work.

Deleting and reinstalling Xcode via App Store has worked (so far).

Just encountered the login issue again where it wouldn't recognize my password, which occurred on Safari but not Chrome on my MacBook, this time at https://developer.apple.com/account which redirects to https://idmsa.apple.com/IDMSWebAuth/signin?appIdKey=... I also notice I can't update my contact details at Apple Developer dashboard > Update your information. It goes to an error at https://developer.apple.com/unauthorized/: "Your account can’t access this page."

Lastly, it seems the false "expired" issue is not limited to just the dashboard message. When I go to App Store Connect > Xcode Cloud, it says "Apple Developer Program membership has expired; To continue using Xcode Cloud, renew the program membership." I'm guessing there may even be further limitations caused by this false positive "expired" detection.

Seems I spoke a day too soon. Received a renewal confirmation email this morning and the previous issues have resolved. Didn't realize processing would take that long. Resolved.