I believe this topic has been coming up quite often and I have gone through quite a fair bit of proposed solution and it does not work for me. E.g. Resetting host, generating response code via offline activation and etc. I had reformatted my Mac recently and tried to reinstall the Lightroom 6 that I had purchased in 2018. However, i am always stuck with the screenshot as shown below, even though i am using my home internet to write this Help Message now. Has anyone managed to resolve this issue? How can product stop working for legacy product as it had removed the activation page? Appreciate your help. Thanks.