Mimestream 1.10.8 — macOS

Gmail on the Mac works fine in a browser, but if you prefer a native email client that feels like part of the operating system, Mimestream fills that gap. It’s built specifically for Gmail accounts and brings Gmail’s server-side features—labels, aliases, filters—into a macOS app without needing to configure IMAP or third-party bridge services.

Runs on macOS 12 or newer with Intel or Apple Silicon

Mimestream requires macOS 12 Monterey or newer. It runs on both Intel and Apple Silicon Macs, and you need a Google account to use it. The app is lightweight and caches recent messages locally, so disk usage stays minimal.

Full offline access to cached messages and search

Yes. Mimestream supports full offline access to your cached messages, and you can search through them without an internet connection. New messages arrive via macOS system notifications when you’re online.

Does it handle Gmail features like aliases and signatures?

Gmail aliases and signatures sync automatically—no extra setup required. The app also supports native Gmail search queries, so you can find messages the same way you do in the web interface.

Don't treat it like an IMAP client—Gmail labels are folders

The most common slip I see is people treating Mimestream like a regular IMAP client. They go looking for folder settings or IMAP paths that don't exist. Mimestream uses the Gmail API, so your Gmail labels show up as folders, and what Gmail calls "All Mail" is the master archive. If you delete a message from the inbox, it gets archived—the same behavior as archiving in the browser. A beginner who doesn't expect that can lose a message for a moment until they realize it moved to All Mail.

Another mistake is trying to add non-Google accounts. Mimestream only supports Google accounts. If someone tries to add a work Exchange account or a personal Outlook address, the app simply won't let them. That's not a bug. It's a design choice. If you need to check multiple account types, Mimestream is not the tool for that job.

People also sometimes assume they need to configure swipe gestures from scratch. macOS has built-in trackpad gestures that Mimestream uses, so you can swipe to archive or sort messages without any setup. But if you're coming from another email client, you might expect to find a settings panel for those gestures. Look in macOS system settings for trackpad gestures, not inside Mimestream.

Sarah manages 100 daily project emails without a buried browser tab

Sarah edits copy for a small marketing agency. She handles about a hundred emails a day, most of them project updates from clients. She used to keep Gmail open in a browser tab, but that tab would get buried under her writing documents. With Mimestream, she can leave the app running in the background and get macOS system notifications when a client replies. She uses Gmail keyboard shortcuts (CMD+Shift+I for inbox, CMD+Shift+S for starred) to move through messages without lifting her hands from the keyboard. When she's offline during a flight, she reads through cached messages and drafts replies that send once she reconnects. The tracking pixel blocking also means she doesn't worry about clients knowing when she opens their emails—a small comfort, but one she notices.

Check macOS notification settings if alerts aren't appearing

• Snag: Notifications aren't showing up. Fix: Check that macOS system notifications are enabled for Mimestream in System Settings > Notifications. Also, on macOS 26 and later, Private Push notifications are on by default—if you turned that off accidentally, turn it back on in Mimestream's settings.
• Snag: A Gmail alias isn't appearing in the "From" field. Fix: Make sure the alias is set up in your Gmail account settings on the web first. Mimestream syncs aliases automatically, but it can only see what Gmail shows it. Refresh the app or restart it if the alias doesn't appear within a few minutes.
• Snag: Search doesn't find a message I know exists. Fix: Mimestream indexes only cached messages when offline. If you searched while disconnected, try the same search while connected to the internet. For online searches, Mimestream uses Gmail's own search engine, so it should find anything Gmail can find.
• Snag: The app feels sluggish after a day of heavy use. Fix: Quit and relaunch the app. Mimestream is lightweight, but like any macOS app, it can benefit from a fresh start. There's no need to rebuild a cache or reauthorize your account.

• Private Push notifications are enabled by default on macOS 26 and later.
• Version 1.10 adds an optional All profile, addresses for unknown senders, and configurable notification actions.
• 1.10.8 is the latest stable release.

• macOS 12 Monterey or newer
• Intel or Apple Silicon
• Google account required