What is your ? (e.g., jailbreaking, flashing a new iOS, backing up data, or bypassing a lock?) How much free storage space do you have on your Mac?
3uTools for Mac 10.1.16 Verified: The Ultimate iOS Management Guide
Even with Windows emulators, 3uTools often fails to communicate properly with iOS hardware via USB on a Mac. 💻 Alternatives for macOS 10.11.6