I have tried numerous attempts to download, install, and launch various versions of Atmosphir for Mac. I'm using a 2011 Macbook Pro thats running Mac OS High Sierra 10.13.6. Each time I try and launch the software I get the prompt "Oops! An error occurred. Your installation of Atmosphir is incomplete or invalid. Please make sure your internet connection is working and run the launcher again." I have tried all versions and keep getting the same response, very frustrating especially considering that I need Atmosphir to view my son's final project for his summer school and he's very uspset he can't see it.