Thank you, Timsam! Reformatting the drive with the allocation size set to 1024 worked. Now I can use my flash drive on my Macs.
J34NLUC
Users receive reputation points by contributing quality content to the forums.
Posts include post and replies published on the forums.
Post authors can mark replies as Accepted to indicate successful solutions.
Apple Developer Forums admins can mark replies as Apple Recommended to indicate an approved solution