Can I activate SubLab offline? Julia@FAW August 16, 2019 07:04 Follow SubLab requires an internet connection to activate. You only need to connect to the internet long enough to paste in your activation code and hit the activate button. After activating you can use SubLab completely offline! . . . Related articles How do I install and activate Sublab? Is there a Downloads limit for SubLab? How many computers can I use SubLab on? SubLab keeps asking for the Activation Code to be entered on macOS. I received the error message "Can't connect." Comments 0 comments Please sign in to leave a comment.