Ever since the release of a new xcodeproj ruby gem version 1.26.0 on 27th Oct 2024, we started seeing rsync.samba errors on our Xcode projects when we were building using Xcode 15.x.

The solution for this was to explicitly add a version lock to xcodeproj version 1.25.0 in our project's Gemfile.

gem 'xcodeproj', '1.25.0'

Post this change we need to run:

• bundle install to update local gems for this project.
• bundle exec pod install to regenerate Pods.xcodeproj

(If you are not using Gemfile or bundler to manage gems, check the version of locally installed xcodeproj version using xcodeproj --version. And uninstall the 1.26.0 version using gem uninstall xcodeproj.)

Why does this help fix the build errors?

• Cocoapods internally uses the xcodeproj gem to generate a Pods.xcodeproj/project.pbxproj file.
• xcodeproj 1.26.0 sets the ENABLE_USER_SCRIPT_SANDBOXING setting to YES for most of the Pod targets for Xcode 16 compatibility. (Github PR)
• By downgrading to 1.25.0 we ensure that this build setting is not set to YES, which helps resolve rsync.samba build errors on Xcode 15.
• NOTE: If you are already on Xcode 16, it is not recommended to lock xcodeproj gem to 1.25.0 as projects which depend on Cocoapods can start failing.