Install and switch between Xcode versions

Keep several Xcode versions side by side with xcodes, and pick one per shell or build.

CI and older projects often need a specific Xcode. The open-source xcodes tool installs any version from the command line:

brew install xcodesorg/made/xcodes
xcodes list               # versions you can install
xcodes install 16.0       # use the version you need
xcodes select 16.0        # make it the default

It asks for your Apple Account to download from Apple (or set XCODES_USERNAME and XCODES_PASSWORD).

Pick a version without changing the default

sudo xcode-select -s /Applications/Xcode-16.0.app   # system-wide
export DEVELOPER_DIR=/Applications/Xcode-16.0.app   # this shell only

Each Xcode takes a lot of disk space, so remove the versions you no longer use.