1:1 is slow but it supposed to be better down the road. The crew at Lightroom Queen suggested Standard for Preview Build. i have not read this all of this thread but I think sidecars are for cameras that do not produce jpeg previews so they need to shoot in RAW and Jpeg. I'm still exploring this.
I also read that if you are running anti virus software it will read each file. I running bit defender in my mac. I have not really noticed any slow import except 1:1 but I excluded LR ad PS from form defender. I'll see if there is any improvement.
I also noticed that when LR gets choky usually everything on the mac is. I have a cleaning/tune routine I use that is more web browser related but it seems to help.




