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Chris Baxter
Chris Baxter, Mac Genius
Category: Mac
Satisfied Customers: 243
Experience:  Computer repair and software development company owner/technician
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Im having the same problem as the person here did. Yosemite

Customer Question

Im having the same problem as the person here did. Yosemite 10.10 won't allow Quark 9.3.1 to open, so I have downloaded Pacisifist and tried to open Quark 9.5 with it but nothing...says the signature is invalid: Operation couldn't be completed.
Submitted: 1 year ago.
Category: Mac
Expert:  Chris Baxter replied 1 year ago.

Hello!

The easiest way to fix here is to update or upgrade your Quark to 10.5 (that version is supported and can be used properly in Yosemite). The alternative is to use VM ware or Bootcamp to install El capitan or another system and run in the Virtual machine.

Expert:  Chris Baxter replied 1 year ago.

Please don't forget to rate and accept! I do not get paid until you do! :)