I have just downloaded and installed the new Autocad LT for Mac 2021 version on a new Macbook Pro 16" running Catalina 10.15.4.

I get major corruption / colorised pixelation / screen artefacts on my drawings when using the new Autocad for Mac LT. This occurs in the model space. These drawings work fine in previous 2020 versions. Screenshot and screencast attached. 

1. Is there a way to resolve this issue?

2. Where can I download a 2020 installer as temporary fix?

Thanks,

Software:

Autocad LT for Mac (R.46.M.1748)

Mac Os Catalina 10.15.4 (19E287)

Hardware:

Macbook Pro 16" 

2.4 GHz 8-Core Intel Core i9, 

16 GB 2667 MHz DDR4

AMD Radeon Pro 5300M 4 GB

Intel UHD Graphics 630 1536 MB