> 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/engine/download.md).
# Download MsgFiler Engine
Which version of MsgFiler Engine you must download depends on which version of MsgFiler you are running. Use this chart to determine which version of the Engine you should download.
Check the MsgFiler About screen to see which version of MsgFiler 3 you are running.
| macOS Version | Download Links |
| ----------------------------------------------------------------- | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------ |
| **macOS Sonoma and higher (14.0 and above)** | - Upgrade to MsgFiler 4 on the Mac App Store
|
| **macOS Ventura, Monterey, and Big Sur (11.0 and higher)** | |
| **macOS Mountain Lion through Catalina (10.8.5 through 10.15.7)** |
|
| **MacOS X Snow Leopard through Lion (10.6 through 10.7)** | |