I am trying to use Thunderbird on a different username on my Mac OSX High Sierra. I have been going around in circles. I cannot get my profiles from one user to migrate to another. Nor can I use my old password on the new user with the same account name. One or two support suggestions, like tools>options to get password, or look under users/library/thunderbird/profiles gets me no where. I can reach the profiles folder though the troubleshooting>show in finder but have no way to go back to the line of text you guys describe. What am I doing wrong? Thanks,