Adobe Acrobat Pro XI hangs when selecting text or zooming, beach ball spins 5 seconds

Adobe Acrobat Pro XI hangs terribly in MacBook Pro when selecting text or zooming. I get the spinning beach ball for 5 seconds. It makes the program virtually unusable.
I reinstalled Adobe Acrobat Pro XI, to no avail.

By contrast, Adobe Acrobat Pro XI works great on my six year old Mac Pro, with no issues.

Is it my graphics card? Is it a RAM issue?

I have no idea and would love some help on this matter.

My Adobe Acrobat XI is up to date: 11.0.09.
Architecture: i386
Build: 11.0.9.29
AGM: 4.28.138
CoolType: 5.11.136
JP2K: 2.0.0.32097

MacBook Pro
15-inch, Early 2011
OSX 10.9.5 (13F34)
2 GHz Intel Core i7
16 GB 1333 MHz DDR3
Graphics AMD Radeon HD 6490M 256 MB

Have been plagued by the same issue on both my new late-2013 MacBook Pro 13" and previously on my mid-2009 MBP. Tried uninstalling and reinstalling Acrobat on my old machine with no luck.

Had similar beach ball issues with Microsoft Word after setting up the new machine. Those appear to have been resolved by removing duplicate or damaged fonts (identified via Font Book). But I'm still getting the long-pause beach ball in Acrobat when selecting text or graphics.

Adobe Acrobat XI: 11.0.10

MacBook Pro (Retina)
13-inch, Late 2013
OSX 10.10.1
2.4 GHz Intel Core i5
8 GB 1600 MHz DDR3
Graphics Intel Iris 1536 MB

Let me know if you get anywhere with Acrobat Pro. I have been unable to fix the issue. It's persisted through several updates so I'm wondering if it has something to do with my computer.