Still using LR5 without issue until this week. First attempt to transfer 900 files resulted in ~440 being loaded before the import simply hung. Tried again, similar result. Tried doing smaller batches: 180 transferred, then 115 when it stalled again. At this point, I can't transfer more than 5 before the import hangs. Note the LR is still functional, more or less: I can cancel the import and go about using LR. But the import function is now greyed out and I have to restart LR in order to try another import.
The only different this week compared to the last time I tried to import is MacOS installed an update this week.
I am a Windows user, so I can't offer any useful suggestions. Just a word of caution. Do not uninstall Lightroom 5 hoping to reinstall to fix the problem. The installer is 32-bit and the new Mac operating systems will not run it. As the OS changes I think you are running the old version at your own "risk" because Adobe isn't supporting Lightroom 5 at all anymore.
What is your MACOS? and what versio?
Where are you keeping the photos?
What method of import?
I'm on Catalina (10.15.7).
In the Import function, I Copy the photos to my local internal hard drive.
that happens if instead of using LrC to directly import the photos. You, instead, use File Manager to copy them to the appropriate folder, then use Lightroom to import them via ADD?
Was so hoping that would work. I popped the SD card into a reader, used Finder to copy them to the hard drive, and then tried to Import | Copy. And nothing happened. I'm looking at all the photos in the Import dialog, I click Import and nothing happens. I cancel the operation and get the message Nothing to import.
Note that the Add option across the top is not active--only Copy and Copy as DNG are active.
This is just so weird.
Consider restoring the preference file. The preference file can get corrupted leading to buggy behavior. Warning that preferences settings will go back to defaults
Took a few tries to get rid of the preference file since none of the suggestions on that page worked. (I ended up searching for com.adobe.lightroom.* and found a match and renamed it to get it out of the way.) Restarting LRC and now the Add function was back on the Import menu and was able to add all 901 photos into LR. (Unfortunately though, still can't load them all direct from the camera.)
Thanks for the preferences suggestion.