When all platforms are selected for download via Safari, it is a game of roulette where either a platform is not downloaded, Xcode is included in the download, or Xcode is not downloaded, but all four platforms are downloaded. This then creates a download mess with the manifest file because now you have a uncheck a few platforms and start all over again. How do you raise the Safari concurrent file download limit?
Max of four files allowed during Xcode 15 beta & platforms download
Yes, that bug is there since day 1. Solution: download only and only Xcode. Unselect all platforms. After download install Xcode and run it. Create a new project. Then click on all paltforms, one by one. Xcode will tell you the selected platform is not installed and installation is needed. Agree and install one by one. It has been working for me since day 1. Have a good day!
Johel