Bitmask for Mac OS

Download latest version

Bitmask requires Mountain Lion or newer.

Download for Mac OS

Once the .dmg has been saved to your computer, mount the image and drag “Bitmask” to your Applications folder.

Download other versions

If you want to install an old version of Bitmask, you can browse all releases.

Configuring email

To get encrypted email to work, you have two options:

1. Install the Bitmask Thunderbird Extension (recommended).
2. Configure your email client manually.

Manual email client configuration:

• IMAP — localhost:1984
  • username: the full email address you use with the Bitmask app.
  • password: ignored, can be anything.
  • SSL/TLS: off
• SMTP — localhost:2013
  • authentication: none
  • SSL/TLS: off

You should also disable any local caching in your email client, if applicable. All the data stored by Bitmask is kept on disk in an encrypted format, but your mail client might cache your email in clear text, so it is good to disable caching if you can. Also, all your Bitmask email is sync'ed locally anyway, so there is no benefit to local caching.