Note to users of Mac OS X 10.7.5 and above:
The default Gatekeeper
for Mountain Lion are to only allow application downloads from the Mac App Store and identified developers. The Protege software does not carry "identified
developer" status, and you may see an error when attempting to download that the installer file is "damaged and can't be opened". To successfully
download the installer file, navigate to Apple menu | System Preferences... | Security & Privacy | General tab, and select "Anywhere" from
"Allow applications downloaded from".
We strongly encourage everyone to use the Stanford hosted solution of WebProtege
where we frequently push new features, bug fixes, and regularly back up data. If however, you require a local installation, use the download link below.
Protégé Desktop 4.3
This version of Protégé supports OWL 2 ontologies. For more information about how to choose an install method, read the
"How do I install Protege-OWL"
question in the FAQ.
Protégé Desktop 3.5
This version of Protégé supports OWL 1.0, RDF(S), and Frames ontologies.