Exit All Programs
It is recommended that you exit all programs, especially existing copies of OpenSim, before you run the installation program. Also, you should temporarily disable virus detection software.
Run Installation Program on Windows
A Setup Wizard will guide you through the installation process.
Run Installation Program on Mac
A setup wizard will guide you through the installation process on Mac, as well.
Right-click to select the installer package and choose Open from the dropdown menu. Choose OK when the security warning appears to launch the installer. Then follow the instructions that appear.
OpenSim will be installed in ~/Applications/ (if you selected "Install for me only") or /Applications/ (if you installed system-wide).
If you have installed OpenSim previously, you can run the following in a terminal to clear previous OpenSim preferences:
defaults delete org.opensim.version40