Try to download Adobe Photoshop CS5, but I get the message "installation is damaged and cannot be opened. You must eject the disk image. "What should I do?

I'm on a MacBook Pro for mid-2010 OSX 10.11.3 running.

I have the discs for CS5, but my CD drive no longer works. I tried downloading it several times.

Yes, that IS the problem... your OLD and NEW program, operating system are not really compatible, so you have problems

IF El Capitan Mac read below

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

-which means you are trying to use CS6 and earlier at YOUR risk of having problems

-You can get CS6 and previous programs to install and run, or you can not (some do, some don't)

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

Install CS5 on Mac 10.11 https://forums.adobe.com/thread/2003455 can help (also for others 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-developer s-mac-os-x-0158095 /

-the guardian https://support.apple.com/en-au/HT202491

Tags: Adobe

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