This working for Mac 100% i tested El captian last 10.11.5
First, if you have old version uninstall it the restart your Mac go to this website https://www.techsmith.com/download/camtasia/
install Mac version
Once you install the Camtasia it should show 30 days trial
close the Camtasia Install the crack file https://mega.nz/#!GVYmiIAD!7KktIY987U...
Then disconnect any internet connection
open the crack file program .
Next, go to application folder drag the Camtasia to the crack file leave for a bit it should say crack successfully done