Applied the Mac OSX Security Update 2020-005 on 3rd October 2020 and Autocad LT 2021 stopped working. Have since tried clean installation of the current Autocad LT 2021 download, updating license manger etc with no success. This is causing real issues for me, I'm a sole practitioner Architect relying on Autocad LT to operate my business. Anyone in same boat or solved this?