TL;DR Can earlier versions of the Apple Developer App be available to download from developer.apple.com? I'm trying to install the Apple Developer App on a laptop running Catalina. The App Store says it can't be installed because the Developer App requires BigSur ("version 11.1 or later"). Yet my other laptop has an earlier version of this app installed on Catalina, which still works. (It does give me the same error when I act on its request to "upgrade to the latest version," but at least the installed version works). As developers we often need to work under older versions of macOS to support our software that still runs on older versions of macOS and iOS. It would be helpful to have this tool on those older macOS installs. Just as older versions of Xcode are available for download to registered developers, can these development tools be similarly available? (I should note that these laptops also have Big Sur installed on separate startup volumes, but I find I'm still spending more time in Catalina to support our existing iOS apps.) Thanks.

I've just installed Xcode 12.2 and 12.3 on a 2019 MacBook Pro and a 2020 MacBook Air, both running Catalina. The installed sizes are wildly different on the two Macs, yet both seem to work (after repeating one install that failed on the Air). MacBook Pro Xcode 12.2 is 28.54 GB Xcode 12.3 is 29.07 GB MacBook Air Xcode 12.2 is 8.97 GB Xcode 12.3 is 0.69 GB = 692 MB Can this possibly be correct? Or can I expect those on the Air to have problems as soon as I try to do serious work with them? By "seem to work" I mean I can create an empty SingleView app with each and run it in Simulator. All four apps (two versions on two Macs) launch as expected. The two Macs are: MacBook Pro (13-inch 2019, Four Thunderbolt 3 ports) Intel 2.8 GHz 4-core i7 16 GB memory, 1 TB SSD drive macOS 10.15.4 MacBook Air (Retina, 13-inch 2020) Intel 1.2 GHz 4-core i7 16 GB memory, 512 SSD drive macOS 10.15.5 Thanks for any insight you can offer.

I've been having serious performance issues developing iOS apps since moving to Catalina. Sometimes Xcode can take over a minute to open a small (under 4K lines) test project. Other times Xcode freezes with a spinning cursor before resuming on its own. In general it feels significantly slower than Mojave on the same MacBook Pro. Now I'm wondering if this is a security/access issue caused by how I've configured my machine. Instead of having everything in a single ~/Documents folder, my work files are spread across three APFS partitions: /Volumes/Catalina/Users/Shared /Volumes/Mojave/Users/Shared /Volumes/Work Do I need to give Xcode extra access to these folders? In 'System Preferences/Security & Privacy/Privacy/Files and Folders', only 'Documents' is listed under Xcode. Should I add these folders to that list? Or is there some other way/place to add them? In general, has anyone had similar issues with Xcode on Catalina? Specs: MacBook Pro (13-inch, 2019, Four Thunderbolt 3 ports) 2.8 GHz Quad-Core Intel Core i7 16 GB RAM, 1 TB internal SSD also an external 2 TB USB disk drive for backups. using Xcode 11.6, Xcode 11.7, Xcode 12.0 GM

Xcode 12 (now beta 6) has one 'App' template for new projects where earlier Xcode versions had three: 'Single View', 'Master-Detail' and 'Tabbed'. Why? I expected to find this question already asked and answered, but searching here and elsewhere (Google) gets only irrelevant hits. What Xcode 12 documentation I can find makes no mention of this change. There is no "What's New in Xcode" in WWDC 2020's videos. Clearly this is Apple's intent, but what is the reasoning behind it? Are Master-Detail and Tabbed UI designs deprecated? Is there some other (easy) way to create such apps? Where can I find some documentation explaining this change ... in detail?