Mac Mail.app can import mbox files but the default storage is emlx if I remember correctly for Spotlight indexing. Thunderbird should also import mbox I am a

Mac Mail.app can import mbox files but the default storage is emlx if I remember correctly for Spotlight indexing. Thunderbird should also import mbox I am a bit paranoid about my Gmail account so I use the Mail.app to download the emails and then I back it up. If my account gets locked for whatever reason, 'Download Data' option is not going to exist. So better to backup through other means as well.