installand the progress bar starts to fill and then pops back to the install button
git config --global http.proxy http://proxyuser:firstname.lastname@example.org:8080
git config --global https.proxy https://proxyuser:email@example.com:8080
everything would be so much better if the uuid would be inserted automatically
There would probably also be a lot more crashes. UUID's purpose is to ensure that the plugin maintainer tests and updates his/her plugin before allowing Xcode to load the code. This is particularly relevant as AFAIK Xcode doesn't exposes a public API for plugins, so they just hook into private methods. Have the developer say "yes, my plugin still works on this version" explicitly is IMO a good thing.
If you're particularly eager to use the new Xcode version and really can't work without plugins (which I can understand) there is a bash script floating around in recent Alcatraz issues to add Xcode's UUID to all your installed plugins (but then expect crashes ;) )