Step 1: Download Absinthe 2.0.2 the latest one, from this link (According your OS).
Step 2: Double click to mount the downloaded dmg, and then drag the Absinthe to your desktop.
Step 3: Now right-click on Absinthe you dragged previously on your desktop, now choose Show Package Contents on the contextual menu.
Step 4: Now double-click to the folder named: Contents.
Step 5: Now double-click the folder named Mac0S.
Step 6: Now open a new Terminal window.
Now click Return in order to launch the application.