Dear all, there are already at least 2 similar threads with the same topic but without any solution so far. I just completely reinstalled my iMac mid2011 from scratch (after reformatting the drives). I used the latest OSX supported for that model which is 10.13.6 High Sierra (where Parallels 11 was running fine before I formatted the drives). During the Parallels 11 installation process I was asked to enter my account data for activation. It failed with the following error message: "Check your Internet connection". My internet connection is fine! I am just logged in in my Parallels account and downloaded my P11 copy from there (plus the license key). I think Parallels has changed something with the activation servers (I faced the same issue with Adobe Lightroom 6, but Adobe provided a workaround for this). Can you please support and tell me how to activate my copy of Parallels 11 on OSX 10.13.6.? I payed for it and legally own it (without any expiration date)! I think I should be able to install and use it. To make things clear. Product is "Parallels Desktop 11 for Mac". I entered correct mail-address and password for my parallels account. After confirmation - the error message "Check your Internet connection" appears. From my experience with Adobe Lightroom 6 activation I think there it was related to an update of the Adobe activation servers to TLS 1.2. Please Parallels Support - help the users with this activation issue. I am not alone. I already tried https://kb.parallels.com/124073 and https://kb.parallels.com/en/113744. But after executing all the steps the problem still exists. Thank you and best regards!