Hi,
I opened a thread 20 days ago but received no solution to my problem so I am trying again.
I installed fresh box drive and my thumbnails are not visible on mac. I did follow the article:
https://support.box.com/hc/en-us/articles/360043697574-Making-Content-Available-Offline
my folder containing images is available offline and still it does not work. The entire box is useless without this feature as you have to press each photo...and wait for it to show. Uninstalling and restarting box drive did not help as suggested by one of customer service reps.
Your help will be appreciated.