Mac/PC: How to change the developer of an Apple Disk Image?

Question

I am trying to use a GD-0912-U Intuos Graphics Tablet in OS X El Capitan‎ at a public hackerspace. They will let me install any programs on the iMac, barring that Gatekeeper believes it is from a trusted developer.

I have been able to get this tablet working in Windows 7 by installing older drivers that were found online. This tablet is obviously not going to work with current Intuos drivers.

I have managed to find drivers that will likely work, but I cannot install them unless the OS believes that the app is from a trusted developer. New drivers downloaded from the Wacom website install perfectly, and show that Wacom is the official developer. It seems that the old drivers were created before Gatekeeper existed; therefore, they do not have the proper developer information.

Is there a way to alter developer information on an Apple Disk Image?

Could I take information from recent Intuos drivers and copy it into the .dmg?

Answer 1

No. The developer certificate signs the application and any modification of the seal will make the validation fail.

Basically any trivial cut and paste won't work. You would need to:

• sign up as a developer and sign your package
• get permission from Apple to sign kernel extensions if that is the nature of the driver
• work with the maintainers of the lab to find and install drivers for your hardware.

Answer 2

You can install the drivers on your Mac (but I dont't know if they'll work properly) All you have to do is to stop temporary Gatekeeper:

• Open the dlmg package
• Press the ctrl key on your keyboard, and click once on the pkg file, you'll see a local menu.
• Click "Open", you'll see the Gatekeeper alert, but with another button: "Open"
• Click on open, and the installation will begin!