Disk image could not be opened

[sarahj32701848]

I'm trying to reinstall CS5 on a new MacBook Pro. I have uninstalled on the old MacBook and downloaded the Design Standard package. But when I open the folder and click the Instal icon, I get this message:

“Install” is damaged and can’t be opened. You should eject the disk image.

I have now tried this three times, all with the same result. Help!

[Guest]

I have this problem - does anyone know why?

[Jeffrey_A_Wright]

Branching to a new discussion.

Paulk60013907 this error typically means that the DMG file you downloaded has been corrupted.  I would recommend downloading a fresh copy of the retail installation files from Other downloads .  You are welcome to update this discussion if you continue to face errors.

[John T Smith · Accepted solution]

IF Mac El Capitan read below

CS6 and earlier programs have not been tested and will not be updated to run on Mac El Capitan

-which means that you try to use CS6 and earlier at YOUR risk of having problems

-you may get CS6 and earlier programs to install and run, or you may not (some do, some don't)

-Java https://helpx.adobe.com/dreamweaver/kb/dreamweaver-java-se-6-runtime.html may help

And this is specific to your error message

Install CS5 on Mac 10.11 https://forums.adobe.com/thread/2003455 may help (also for other than CS5)

-also a TEMPORARY security change https://forums.adobe.com/thread/2039319

-http://mac-how-to.wonderhowto.com/how-to/open-third-party-apps-from-unidentified-developers-mac-os-x...

-and more on gatekeeper https://support.apple.com/en-au/HT202491