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On Jul 21, 2014, at 14:50 , Robert Lauriston <robert -at- lauriston -dot- com> wrote:
> I installed the trial version of Acrobat Pro XI on my work Mac (OS
> 10.9.4, 8GB RAM) thinking it might be worth the cost for the document
> comparison feature. After comparing two documents, it seemed really
> unstable, eventually crashed, and now tells me the evaluation period
> is over.
> I run a wide variety of software on that Mac without trouble. Has
> Acrobat jumped the shark?
I am also using Acrobat Pro XI with OS X 10.9.4 (MacBook Pro 17" Late 2011, 16 GB RAM).
The Compare Documents feature works fine, depending on your needs. It highlights the changed text and attaches a Comment icon to it. When you hover over the change, you see something like this: