@Claude31 That worked just perfectly. For future me, or other future developers: Moved Xcode to Trash Emptied Trash Downloaded the 15.4 package (https://developer.apple.com/services-account/download?path=/Developer_Tools/Xcode_15.4/Xcode_15.4.xip) - see full list of downloads using the link in @Claude31's response. Extracted the app and moved it to Applications Worked perfectly! Thank you for responding and for the link to the direct download site - I didn't realize you could bypass the App Store for Xcode and install it directly. I think I'm set now, I hope you have a great day!