Email clients that support Gmail aren't exactly rare, but the vast majority of them use the IMAP protocol to retrieve and manage your messages, which means they can't take advantage of Gmail-specific features such as inbox categorization, labels, and synchronized signatures.

Mimestream goes about it differently — it uses the Gmail API, allowing it to provide most, though not quite all, of the features you are familiar with from Google's mail client. It's also worth noting that the app is written in Swift, so it will integrate very well with macOS and provide a much smoother experience than, for instance, an Electron-based app.

Most of the well-known Gmail features on your desktop

Whenever I try to manage my Google Mail account with anything other than Gmail, the one thing I miss the most is email categorization. Without it, my Inbox is flooded with promotional and social-media-related messages that I'm very much not interested in.

With Mimestream, you get all of this functionality and a lot more. Your aliases are also synced automatically, as are your signatures, and you can take full advantage of Gmail's labeling system.

Of course, not all Google Mail features are available using Gmail's API. For instance, you cannot snooze emails, but given everything else that the app can do, this is a very minor issue.

A very swift Swift-based app

You've probably used an Electron app before, and it's difficult not to notice how sluggish most of them are, while also not integrating well with the OS, and sometimes even looking out of place.

There are no such issues with Mimestream. It is written in Swift, making it much more resource-friendly and fast, in addition to integrating perfectly with macOS and supporting a wide range of keyboard shortcuts for managing your mails.

In short, if you use Gmail and happen to own a Mac, you have absolutely no reason not to grab Mimestream. It is infinitely better than using Apple Mail to connect to your Google account since it uses the Gmail API, and it integrates perfectly with the OS thanks to being written in Swift.

What's New:

Mimestream 1.8.0

New:

• Support for the new Liquid Glass UI on macOS 26

Improved:

• Added "Trash / Archive" as a right-edge swipe action

Fixed:

• Google contact groups don't appear in autocomplete
• Avoid inserting text replacements (like period instead of double space) inside code blocks
• Clicking on a Notification Center notification doesn't work after a cache reset
• Pressing the tab key should move focus to the "From" field with full keyboard access enabled
• Reauthenticating accounts sometimes happens with insufficient scope list
• Inconsistent ordering of addresses in the compose window's From address picker
• App crashes when reordering accounts on macOS versions below 15
• Signature popup doesn't update when signature name changes
• Signature popup should be shown even if there's only one account
• The "Create New Label" sheet gets clipped in some localizations

Cleanup:

• More efficient processing of IMAP-based push notifications
• The reconnect prompt in the status tray no longer requires clicking through two alerts
• Show subtitle with number of utilizing addresses in signature settings rows
• Added various preconditions to trap some sync bugs

Screenshots:

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