Hiya!

I have a Mac that operates on Catalina (it cannot be updated to a newer OS). I am therefore unable to dowload AutoCAD desktop. I am however able to run Autocad Mobile on my iPad Pro, and able to access Autocad web. My issue is adding blocks. I am unable to set up a library as i can't download the desktop version. Would it be possible to locate and download an older version of autocad so that i can supliment my use of it on web and mobile? Thanks.