Download is very slow on mac on 2020.2

Hi,

One of my customer move from 2017 to 2020 Pro. ( we are reseller).

She’s on Mac, last release of Sketchup without any extension, (all machine information include into the zip file).

Inside Sketchup , she click on the 3Dwarehouse button, make a search on “windows” and select this simple component one,
the download progress appear and ended very quickly as expected but the 3Dwarehouse windows become grey, and nothing append during 7 minutes. After that, the component is normaly loaded inside the model.

I try to import the component from an empty model, it load with standard speed.
I try to import the component from the apple finder, it load with standard speed.
On my mac, I try to open the same model and download the same component, it take 2 second as normaly.

I try all openGL setting but nothing change
I try to remove cut and section but nothing change

I try to purge the model and it take 45s instead of 7minutes. But 45 second is still very long.

Please find atached the sketchup file.
Mr TRIN 3D PLAN_.skp.zip (5,2 Mo)

Thanks for your help

Archive.zip (1,1 Mo)