: If you are running large analyses with many parallel chains, you should use the MPI version. This requires manual compilation on Windows using tools like Microsoft Visual Studio and MPI libraries (e.g., MS-MPI).
: Locate the file named MrBayes-3.2.7-WIN.zip (the latest stable release as of 2025/2026) and download it. download mrbayes for windows
Once installed, you can launch MrBayes by double-clicking the executable or opening a (or PowerShell) in the bin directory and typing mb . : If you are running large analyses with
For most users, the pre-compiled serial version is the easiest to set up. Once installed, you can launch MrBayes by double-clicking
: Use lset nst=6 rates=gamma to specify a GTR+G model.
MrBayes is optimized for speed rather than low memory usage. For standard analyses, ensure your system meets these minimums: : Single-core CPU with a base speed of ≥2.0is greater than or equal to 2.0
: Unzip the folder to a location on your drive. It is recommended to use a path with no spaces and only English characters (e.g., C:\MrBayes ) to avoid command-line errors. Identify the Executable : Open the bin folder within the extracted directory. For 64-bit systems, use mb.3.2.7-win64.exe . For 32-bit systems, use mb.3.2.7-win32.exe .