posted same at MS, it's a bug between Mountain Lion AND Powerpoint. You guys should put your heads together. The whole reason using a MAC in the creative world is for a big part presenting. Using powerpoint means cross plarform compatibility. Having the latest OS, should be about enjoyment not ignored bugs 🙂
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Hey,
exact same problems MBP 16GB 15" Mountain Lion Retina. Bugs occurred straight a way, unboxed MBP installed Office, run updates. Problems at bottum with transitions using Powerpoint.
I did notice when I used a VGA output screen at a customer, the bug was non present. When using my normal screens (full HD using HDMI port), it is.
Feels like something going wrong with image buffering, and addressing the wrong memory blocks when using transitions. Yeah I'm a technical noob so excuse the obvious flaws in my reasoning, but still. Definitely looks like some native Apple lowlevel graphic functions are called in Powerpoint Mac, that mis address the correct graphic memory when using multiple pages and graphics + Mountain Lion.
BTW same MBP using bootcamp/W7, has NO problem with the exact same PPTX. MBP with Lion NO problem with exact same PPTX.
And as stated before, nobody knows to even exactly address the problem in Google. This was my second attempt to find a similar thread. To be honest I'm just happy not being the only one :).
Please fix,
regards Max