In order to obtain the drivers to use the card reader SCR 3310v2.0, aswell as the middleware needed to use your Qualified Certificate, download the file available here.
Open Adobe Acrobat Reader
Go to Acrobat Reader -> Preferences
On "Categories", select "Signatures" and button "More..." on "Identities & Trusted Certificates"
Select "PKCS#11 Modules and tokens" and click on "Add module"
Paste the module's path: /Applications/tokenadmin.app/Contents/Frameworks/libaetpkss.dylib
Press "OK"
Check if the digital id of the certificate being used is shown on the side panel.
Select the chosen token, and click on Login at the upper panel.
Insert your pin code:
SafeSign is now installed and ready.