LR Classic so slow on my Mac

LR slowness isn’t always Adobe’s fault! Any operating system can bog down a specific app. Try this: Please give your Mac the "once over"! Run the free Onyx (https://www.titanium-software.fr/en/o...), reboot. (In Onyx just run everything in the Automation tab). Run Disk Warrior if you can ($120), (https://www.alsoft.com), reboot. If you can’t do Disk Warrior, at least run First Aid from Disk Utility. Also just doing a "Safe Boot" can clear out caches (restart, hold down shift until you see "Safe Boot" on the screen). Let the boot finish, then reboot normally.


If that doesn’t work try launching Lightroom from your other (admin or test) account, with a new catalog, as a test. Does it run OK? If it does it may be a corrupted preference in your Username/Library folder. Check The Lightroom Queen site for instructions on how to reset your LR preferences (https://www.lightroomqueen.com).

Maybe not Adobe fault, but LR is the only software I suffer from this lag (Ok I'm a bit sarcastic, but U remember Adobe was able to create on windows a full 650Mb pdf reader :) )
TY for reply anyway. I know Onyx. Will try.
Will try disk utility because I don't really want to buy disk warrior, but good to know

Will let you know

Some news

I've launch onyx,  restart save boot, launch onyx on save boot, reset Lightroom preset tanks to Lightroom queen (https://www.lightroomqueen.com/how-do-i-reset-lightrooms-preferences/) (Victoria is probably one of the most influent en capable person regarding LR)

But no, LR classic is laggy as heel

I think I will uninstall and install start from scratch
Same fo LR CC, I will install and start from scratch 

pffff sad to spend more time optimize LR than use LR 

No.. After 1 more week, sync is not finished. LR classic is slow, laggy.
And I'm afraid because of next iteration of osx and potential compatibility problem 

Sync is done 5 photos at a time. So slow. Resulting I can't even Classic to use it with photos imported in CC

OKay, I want to show how LR Classic is laggy on my MBP 15" 2017 with 16Gb memory

It is near unusable: 

Yeah, I’ve got 16GB on my 21” iMac (late 2015), and I’m running Memory Clean (I paid for the Pro version) about 5 times a day! It’s time to realize that 16GB RAM just won’t do anymore to edit photos. I’m waiting for the new iMacs to be announced later this year to upgrade, to 64GB RAM! That should hold me for a few years! I suggest you go to at least 32, 64 is better!

You probably right.
I’m thinking about next gen MBP with 32gb ram

But LR CC runs smooth. Same for Photos
So I wonder if LR 7 is not a dead alive software.
Actually I wonder if LR 6 is not faster. Need to try.