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Activate Mail Plugins: How to enable Mail plugins in macOS Big Sur

How does Mailbutler work in the latest Apple iOS update? Don't worry - Mailbutler is here to take you through the process, step by step.

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By James

James has five years' experience as a Content Marketer, bylines on Left Foot Forward, Submittable, and INOMICS, and a Master's in History. In his free time he likes to read, play guitar, and write for his personal blog.

In the Apple Mail app on mac Big Sur and later, users will need to manually activate any plugins they’ve installed. With the Big Sur-compatible version of Mailbutler installed, and before you start using your inbox with Mailbutler, you’ll need to first activate the app manually through your Apple Mail Preferences and restart Mail.

In this quick post we’ll guide you through the steps to enable your plugins on Apple Mail in macOS Big Sur and anything which might come after that.

Register with Mailbutler now

How to activate Mail plugins in Big Sur

  1. Open Apple Mail and click Preferences…
    Apple Mail Preferences to activate Mailbutler plug-in in Big Sur
  2. Click on Manage Plug-ins in the General tab
    Apple Mail Preferences to activate Mailbutler plug-in in Big Sur
  3. Activate the plugin Mailbutler.mailbundle by checking the checkbox
  4. Click Apply and Restart Mail
    Activate Mailbutler in Apple Mail in Big Sur
  5. Open Apple Mail and start using Mailbutler!

It’s as simple as that – Mailbutler is now enabled and will start working in Apple Mail!

If you are on Big Sur (11.2.1) or later, and you don’t even see the Manage Plug-ins button, please read our article Manage Plug-ins button is gone from Apple Mail.

What’s new to Mail in macOS Big Sur?

Mail in macOS Big Sur comes with a couple of new features:

  • Get reminder suggestions in Mail which are recognised by Siri
  • New full-height sidebars which makes it easier to track your inbox
  • New symbols for apps in toolbars, sidebars and controls, some of which are shared by apps which share common tasks, such as Mail and Calender
  • Interactive notifications, on which you can click and take immediate action, such as replying to an email

Mailbutler’s extension for macOS Mail comes fully compatible with Big Sur and boosts your inbox with time-saving features such as:

To stay informed about Mailbutler updates, make sure to follow us on Facebook, Twitter, LinkedIn and check our Blog regularly for new content.

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Comments (14)

  1. Using 10.14.1, having issues performing the upgrade, and my Manage Plug-Ins button is absent from the application.

    14 Mar 2019
  2. great points altogether, you just gained a brand new reader. What would you recommend in regards to your post that you made some days ago? Any positive?

    07 Jun 2019
  3. It keeps de-activating on restart for me.

    21 Aug 2019
    • Hey, thanks a lot for your comment. I’m sorry to hear that you’re having problems. Please contact our lovely support team They will be happy to help you out! Thanks, Tiffany

      22 Aug 2019
  4. I am using Mojave 10.14.6 but I don’t see a ‘Manage Plug-ins’ button.

    22 Sep 2019
  5. This doesn’t work. There is no ‘manage plugins ‘ button now. Please update

    20 Jan 2020
  6. It’s been applying changes for ages

    25 May 2020
    • Help please

      25 May 2020
      • Hi, thank you for reaching out! Our support team will be happy to help you. You can contact them via email

        11 Jun 2020
  7. Any alternatives to Herald for Mojave?

    Herald would pop up a translucent window whenever new mail arrived. You could read the mail, delete it, mark it as junk, or open it in mail. It was great! But it won’t work in Mojave. 🙁

    05 Jan 2021
    • Hello Jan,

      That’s actually a function of Mail, and you can achieve that by going to the System Preferences on your Mac, then Notifications, select Mail, and then choose “Alerts” as the form of notification you wish to receive. I just tested this myself, and when an email comes in, a pop up notification appears in the right upper corner of my screen. If I hover on that alert, “Options” appears, and I can then select “Reply, Mark as Read, or Delete”.

      06 Jan 2021