Xcode 27 is in beta right now (beta 4 at the time of writing), and it is a big release. Apple's official release notes are lots of lines of radar numbers and one-line bug fixes, which is great as a reference and terrible as a read.

Can you even run it?

Before anything else, check these three lines:

Xcode 27 requires a Mac running macOS Tahoe 26.4 or later.

Xcode 27 only installs and runs on Apple silicon Macs. If you are still on an Intel Mac, this release is the end of the line for you.