"Gnucash.app" 2.6.12-2 is damaged after installing on Mac OS X 10.10.5

[John Ralls]

> On Jun 4, 2016, at 3:38 AM, C Velevitch <chris.velevitch at gmail.com> wrote:
> 
> I just downloaded and installed gnucash 2.6.12-2 on Mac OS X 10.10.5.
> 
> When I try to run it for the very first time, I get:-
> 
>     "Gnucash.app" is damaged and can't be opened
> 
> How do I fix this?
> 

This is a security error meaning that the app doesn't match its signature or that the signature can't be verified. Unfortunately Apple provides only a command-line tool to get the details. Launch /Applications/Utilities/Terminal and type at the prompt
  spctl -avv path/to/Gnucash.app
making the obvious substitution (e.g. /Applications/Gnucash.app if like most folks you put GnuCash in the Applications folder). If everything were OK it would report  
  path/to/Gnucash.app/: accepted
  source=Developer ID
  origin=Developer ID Application: John D Ralls

Instead it will say something else that will explain the problem. For example, if the application bundle has been modified or corrupted it will say
  path/to/Gnucash.app/: invalid signature (code or signature have been modified)

In which case you need to download it again from http://www.gnucash.org.

Regards,
John Ralls