InDesign CS5.5 and CS6 are not supported by Adobe to run under El Capitan and Siera. Some report no problems, others do.
Yes I am aware of that, I am planning on updating to ID CC 2017. What I was asking was - is my hardware sufficient. Am also going to add another 8 0r 16 gigs memory.
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I've been running ID CC 2017 in a macbook pro mid 2012 with sierra and 8 gb ram is working very good, i don't think you should have any problems.
You got someone with similar configuration with a perfectly working program apart from the the system requirements for InDesign:
System requirements for Adobe InDesign CC for Mac and Windows OS . I believe you can proceed & should not have an issue. Adding RAM would assist as well.