Hi, I have got latest Thunderbird installed with Mail Merge Version 10.4.0 on a Mac. When I try to send a mailmerged email from a CSV (Used automatic or comma separated setting), it throws an error saying "Unsupported Zip file" and gives me links to the Home Page and the Change Log file. When I accept the error message, it allows me to go into the final mail sending window. However, when clicked the "Start" button, no mail is sent. Mail merge works without any issue on Windows PC. The issue is with the MAC. Any help in getting this issue sorted is much appreciated.