The installation was a snap and the fan was very quiet in operation. The Stealth is thin enough to clear adjacent PCI cards. Remove the card of course if it's already installed. Follow your specific Mac model's instructions for opening the case and removing PCI cards. Do a trial placement of the unit on the card to familiarize yourself with how it is oriented and spaced before removing the protective plastic over the adhesive pads.
Alignment is easy but a trial run is recommended.
I used rubbing alcohol and a lint-free cloth. Make sure the chips are allowed to fully dry before applying the heatsink to ensure a good bond. Remove the protective plastic covering from the three adhesive pads on the bottom side of the Stealth. Don't touch the adhesive pads. Install the card in a free PCI slot and route the attached fan power cable to a power supply connector.