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new iMac/slow LR

Joined
Mar 18, 2019
Messages
71
Lightroom Experience
Intermediate
Lightroom Version
5.x
Lightroom Version
5.7
Operating System
macOS 10.13 High Sierra
My old iMac died. I just got a newer refurbished one. LR is very slow. Every action is preceded by small rainbow circle indicating it's processing but not doing. Any ideas what's up? I'll check with the Mac guy, too.
 
Joined
Mar 18, 2019
Messages
71
Lightroom Experience
Intermediate
Lightroom Version
5.x
My OS is Mojave. The iMac is a 2015 model. I believe the catalog is on the system disk (it's in the middle of a long re-start)
 
Joined
Sep 29, 2007
Messages
22,660
Location
Isle of Wight, UK
Lightroom Experience
Power User
Lightroom Version
Cloud Service
I suspect it's the combination of 5.7 and a 5k screen that's the issue. It's about 8x as many pixels as a standard resolution screen, and whereas newer LR versions utilize the GPU to help handle the large number of pixels to process, that wasn't introduced until LR6 initially, and improved greatly in 8.4.
 
Joined
Mar 18, 2019
Messages
71
Lightroom Experience
Intermediate
Lightroom Version
5.x
So if this is the problem, then it makes sense to upgrade to LR 6... until that upgrade introduce other problems.
 
Joined
May 12, 2011
Messages
3,310
Location
Canada
Lightroom Experience
Advanced
Lightroom Version
You'll have a tough time finding a copy. Adobe doesn't sell them anymore. Also, LR 6 is gradually losing capabilities as operating systems change.
 
Joined
Mar 18, 2019
Messages
71
Lightroom Experience
Intermediate
Lightroom Version
5.x
I was looking around to see if I could upgrade from 5.7 to 6, but no such luck. If anyone knows if there is a way to do that, please let me know.
 
Joined
Sep 29, 2007
Messages
22,660
Location
Isle of Wight, UK
Lightroom Experience
Power User
Lightroom Version
Cloud Service
It's subscription time L Robbin. Or, you could hook up a standard resolution monitor and use Lightroom on that, if you're really really anti-subscription.
 
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