Unable to Reinstall PSE 9.0 "'Install' can't be opened."

Question

I had an issue with file corruption (resolved) and need to reinstall most of my applications. I have PSE 9.0 for Mac, and when I attempt to open the installer, it gives the below error message, and it further describes it's because the certificate has been revoked. Is there something else I can try?

I'm on an Apple MacBook Pro with a SSD, 2.8 GHz processor, 16 GB/1600 MHz DDR3, running OS 10.12.5.

Thank you

Jeff Arola · Accepted Answer

Here are the steps i did to get the pse 9 installer to work on macOS Sierra.

Using the directions under Creative Suite 5.5, 5, and 4 on this page

https://helpx.adobe.com/creative-cloud/kb/install-creative-suite-mac-os-sierra.html

1. Double click on the downloaded PhotoshopElements_9_LS15.dmg to mount it.

2. Double click on the Adobe Photoshop Elements icon in the window that appears

3. Right click on the Install.app and click on Show Package Contents

4. Open Terminal by going to Applications>Utilities>Terminal

5. Go to the MacOS folder

6. Drag the Install into the Terminal window and press Return

John T Smith · Answer

CS6 and earlier programs have not been tested and will not be updated for Mac El Capitan/Sierra

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

-Apple did not maintain backward compatibility with old programs in El Capitan or Sierra

--Adobe has a workaround to Apple's problem of not maintaining backward compatibility

--several help links and possible solution inside this message https://forums.adobe.com/thread/2301916

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