Adobe no longer supports Reader for OS X 10.6. The last compatible version is Adobe Reader 11.0.10 . Adobe has removed this download from their main site. I have provided a safe recommendation below. Adobe Reader for Mac OS X 10.6 (Snow Leopard): Final Compatible Version (Free Download) Update: If you are running Mac OS X 10.6.8 (Snow Leopard), you cannot install the modern versions of Adobe Acrobat Reader (DC). The last version to officially support your OS is Adobe Reader 11.0.10 .