A significant update to XE4, correcting a number of bugs or offering several improvements, is now available. Download for registered users of XE4 is at cc.embarcadero.com/item/29446 and the release notes are available on the docwiki at Release_Notes_for_XE4_Update_1.

Notice, this is not a new install, but an actual patch, even if it is a 336 MB download. As an alternative, you can download the new ISO image of the DVD and make a full uninstall/reinstall (it takes about the same amount of time). In both cases, you'll have to (manually) update the PAServer application on your Mac.

You can see the list of QC fixes (this doesn't include a much longer list of issues that were found internally and solved) on edn.embarcadero.com/article/43207.