Apple

icloudmailagent This folder stores temporary cache data for icloudmailagent, a background component related to iCloud Mail syncing and message handling on macOS. DerivedData DerivedData stores Xcode’s intermediate build products, indexes, and debug artifacts created while compiling and running projects. Archives This folder stores Xcode archives of built apps, often used for distribution, notarization, symbol retention, and restoring older build outputs. iOS DeviceSupport Xcode’s iOS DeviceSupport folder stores device support files used when connecting iPhones or iPads for development and debugging. CoreSimulator CoreSimulator stores data for Xcode’s iPhone, iPad, Apple Watch, and other simulator runtimes used during app development and testing.