In the latest beta version of Thunderbird the company added a welcome surprise in the notes: Future support for Apple’s M1 Macs. These notes apply to Thunderbird version 87 beta 1 released February 26, 2021. What’s New: Native support for macOS devices built with Apple Silicon CPUs; New user interface for adding attachments; Clicking on an already-selected pill in the recipient list will now allow editing the address; Copying a large message to an IMAP server would sometimes prematurely display a time-out error; OpenPGP: Messages with a high compression ratio (over 10x) could not be decrypted; and other fixes and improvements.
Check It Out: M1 Support Coming to Open Source Email Client ‘Thunderbird’