I have LR Classic CC on a brand new desktop iMac. I have LR CC on my new MacBookPro 2017. I have LRM on an iPadPro and iPhone. The latter three seem OK and sync properly Not so much with my LR Classic CC. I had help with Adobe last week dealing with my Catalogue. That seemed fixed. Over the past 4 days LR Classic CC has been working on my 33,000 images. When it gets down to around 9,500 to 10,500 it stops working. The sync does not freeze but it goes up and down in numbers around 500 to 1000 but never falls below 9,500 approximately. Basically frozen. Beach ball spins. I can perform a task, like highlight an image, but it takes a minute or so for that image to be highlighted. Finder says it is Unresponsive and Force Quit is needed It is consuming 67% of my Activity Monitor CPU along with Kernal Task of 70% or so. Last night I left it to run all night attempting to finish the Sync. In AM despite having my Energy Saver set to keep HD running, etc, I was greeted with a message that there was not enough Memory and to quit Apps. But none were running. And I was only using 4 GB of 8 GB RAM. I called Senior Apple Advisor and they tried the following (to no avail): 1. I did the usual dragging out Finder>Go>Caches>Adobe>Lightroom>SyncData>Sync.IrData to my desktop 2. SMC reset 3. Zapped PRAM 4. Safe Mode 5. Uninstalled and reinstalled LR Classic CC (but did preserve the Preferences) 6. Reinstalled via Recovery Mode the MacOS X and did an update of the OS 7. Signed out and in to LR Mobile on Devices and on LR Classic paused Sync and restarted it. 8. Disconnected all peripheral devices so that nothing but a USB keyboard is attached. 9. Turned off FileVault The only thing I have not done is to reformat my computer and reinstall a fresh OS X and introduce LR Classic CC installation as the first Application without others being installed other than Apple products. The only other thing I can think to try is to launch my iMac into a Troubleshooting login and install the LR Classic on that User Name and see if I can point to my Lightroom data on an external HD (currently my LR Photos and Catalogues are all on the internal iMac HD). Anyone have any other thoughts as to why LR Classic ceases to work and is taking all my CPU to Sync? Thanks folks! Wayne PS Adobe LR Classic CC is version 1156743 with MacOS X 10.13.3 with an iMac Retina 5K, 27 inch, 2017 machine with 8 GB RAM and 3.4 GHz Intel Core i5
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