[mjfriedman]

Message appears below. I've tried different ports and cords and have rebooted the Kindle (Oasis) and the iMac on which Calibre 5.6 is installed.

Super appreciative of any help:
Michael

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calibre, version 5.6.0
ERROR: Error: Error communicating with device

Failed to access files in the main memory of your device. You should contact the device manufacturer for support. Common fixes are: try a different USB cable/USB port on your computer. If you device has a "Reset to factory defaults" type of setting somewhere, use it. Underlying error: [Errno 1] Operation not permitted: '/Volumes/Kindle/driveinfo.calibre'

Traceback (most recent call last):
File "calibre/devices/usbms/driver.py", line 153, in get_device_information
File "calibre/devices/usbms/driver.py", line 143, in _update_driveinfo_file
PermissionError: [Errno 1] Operation not permitted: '/Volumes/Kindle/driveinfo.calibre'

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
File "calibre/gui2/device.py", line 89, in run
File "calibre/gui2/device.py", line 472, in _get_device_information
File "calibre/devices/usbms/driver.py", line 155, in get_device_information
OSError: Failed to access files in the main memory of your device. You should contact the device manufacturer for support. Common fixes are: try a different USB cable/USB port on your computer. If you device has a "Reset to factory defaults" type of setting somewhere, use it. Underlying error: [Errno 1] Operation not permitted: '/Volumes/Kindle/driveinfo.calibre'