Got an invite, have a Mac, but closed tab after clicking invitation link. Link doesn't work now. Don't know how to get it now.
Have you tried logging in, using the link at the bottom of the page?
Go to the website (https://atom.io) and click Sign In in the footer. A download link will show once you are signed in.
Thanks! After Signing in it redirects me to my github page.
I had to visit atom.io again, click Sign in again and - voila - Download button appears. Very confusing.
I had a similar problem; I downloaded it on a mac that didn't meet the minimum os requirement, then deleted it. Couldn't use the link again on the newer mac. Don't most people expect to be able to re-download this?