DMG file will not open to install

[auctioneer]

Hi

Just finished downloading the CS5 Design Premium from Adobe to install on my Macbook Pro.  I have the file in my downloads folder DesignPremium_CS5_5_LS!.dmg, double clicked and it opens a Adobe window with the Design Premiun Icon and a Readme.pdf  I double click the CS5 DP icon and a file structure opens with the following;

- deploy

- install (with icon)

- packages

- payloads

I doubleclick the  - install icon and a box comes up with the following;

"Install can't be opened.  You should eject the disk image"

I select the "Eject Disk Image" and everything disappears taking me back to the downloads folder where the original CS5 DP file resides.

I have the serial numbers taken from my accounts page on adobe.

Macbook Pro 13" 2017

macOS Sierra

8g memory

Any help getting this installed will be greatly appreciated.

Thanks

Bob

[John T Smith]

CS6 and earlier programs have not been tested and will not be updated for Mac El Capitan or later operating systems

-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

--READ HERE https://forums.adobe.com/thread/2301916 for an Adobe solution to installing old programs, including a link to installing the old Java runtime that is required

[auctioneer]

Thanks John - I’ve managed to install the package - now there is an issue with the serial number.  I took the serial number from my accts page on Adobe.  When this serial number got rejected I dug out the box and the serial number on the CD is the same, yet the number is being rejected.

Any ideas?

Thanks

[John T Smith · Accepted solution]

Invalid Serial Number https://forums.adobe.com/thread/2359923

-Problems with software validation https://forums.adobe.com/thread/2273259

-Warning that software is not genuine http://www.adobe.com/genuine.html