Installing Indesign CS5.5

Question

I've downloaded Indesign CS5.5 from the adobe website for my macOS Sierra (Version 10.12.5) although when I try to click on the Install icon in the downloaded package it says

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

“Install” is on the disk image “InDesign_7_5_LS1.dmg”. Safari downloaded this disk image today at 11:38 am from helpx.adobe.com.

What does this mean?? I have a active serial number for the Creative Design Standard Suite from when I purchased it in 2011/2012 and don't want to purchase the monthly subscription.

John T Smith · Accepted Answer

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

--Also read for more information https://forums.adobe.com/thread/2458382

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