iOS files on Mac are the personal data and system files of your iPhone or iPad that were backed up to or synced with your Mac. These files include all the backups and software update files of your iOS devices that were synced with your Mac, such as contacts, photos, app data, and more. If you have ever backed up the data on your iPhone or iPad to your Mac, the iOS files will be stored on your Mac and occupy some of the capacity of your Mac hard drive storage. Sometimes, your Mac computer even automatically backs up the data on your iOS device once you connect it to your Mac through a USB cable or the same network.

To access and view the iOS files on your MacBook to check whether they are useful for you, you can find them in the storage management pane on Mac. The iOS files are stored in a MobileSync folder, which is created by your system. You can also manage and delete iOS files on Mac with built-in features or third-party software. The safest and easiest way to delete iOS files on your Mac is to use macOS Optimize Storage feature. However, before deleting the iOS files, you should make sure that you no longer need them and that they do not contain important data.