> For the complete documentation index, see [llms.txt](https://docs.msgfiler.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.msgfiler.com/support/plugin/install.md).
# Installing the Classic Plug-In
MsgFiler is an Apple Mail Plug-In. To install and configure MsgFiler, follow these instructions:
1. Quit the **Mail** application.
2. Go to the **Finder**
3. Hold the **Option** key and click on the Go menu
4. Choose **Library**
5. Navigate to the **Mail** directory in the **Library** directory
6. Drag **MsgFilerPlugIn.mailbundle** to Bundles folder in the Mail directory. Create the **Bundles** folder if it does not already exist.
7. If you have never used or installed a Mail plug-in like MsgFiler Classic, you will need to run the following commands in the **Terminal** application:\
If you are using macOS 10.14 or higher, paste and press enter:
```
sudo defaults write "/Library/Preferences/com.apple.mail" EnableBundles 1
defaults write com.apple.mail EnableBundles -bool true
defaults write com.apple.mail BundleCompatibilityVersion 4
```
{% hint style="danger" %}
You will have to enter your Administrator password after the first command.
{% endhint %}
If you are using OS X 10.7 or higher, paste and press enter:
```
defaults write com.apple.mail EnableBundles -bool true
defaults write com.apple.mail BundleCompatibilityVersion 4
```
If you are using OS X 10.6/Snow Leopard, paste and press enter:
```
defaults write com.apple.mail EnableBundles -bool true
defaults write com.apple.mail BundleCompatibilityVersion 3
```
8. Launch **Mail**.
9. If you are using **macOS 10.14 Mojave or higher**, open Mail Preferences
1. Click **Manage Plug-Ins.**
2. Ensure that **MsgFiler Engine** is checked.
3. Click **Apply and Restart Mail.**
## Setting a Keyboard Equivalent for MsgFiler
Next you will create a custom keyboard shortcut to activate MsgFiler in the Mail application.
1. Choose **System Preferences…** from the Apple menu.
2. Click **Keyboard & Mouse.**
3. Click **Keyboard Shortcuts** tab.
4. Click the **+** icon.
5. In the sheet that appears, choose **Mail** from the **Application** menu
6. Enter **Move with MsgFiler** in the **Menu Title** field.
7. Enter the keyboard shortcut of your choice in the **Keyboard Shortcut** field. For instance, **Command-9.**
8. Click **Add.**
MsgFiler is now ready for use! You can open MsgFiler via the Message menu or by typing **Command-9** on the keyboard while in the Mail application.\
---
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