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Does it cause any problems to have a USB plugged into the iMac but not connected to an external device? Should I unplug USB cables when not connected to an external device?
iMac Line (2012 and Later)
No, that will not cause a problem.
No, that will not cause a problem.
Thank you for your response. Have a great and healthy day.
You’re welcome.
FWIW I’ve always leave two spare USB cable connected to my Mac. One for syncing iOS devices and a USB 3.0 cable for attaching redundant backup drives.
USB no device
