OS 10.8.5 gameplay slowdown (steam)

[Jabberwok]

I've seen a number of topics about poor performance on Macs, but nothing that fixed the problem for me, or was precisely the same. What I don't understand is that the game ran almost perfectly from the time I bought it, when it was first released for Mac, up until a few months ago. I've played through the entire thing multiple times and had no problems, but recently it has been running so slow that it is unplayable. I don't know if this is because of changes made in an update, or something else.

 

I have a laptop with a Geforce GT 650M. It has an integrated card also, and I already went into the energy saver control panel and turned off graphics switching, so it should be set to use high performance all the time. I thought this was helping at first, but the slowdowns are still pretty terrible.

 

As I said in the subject, I'm running 10.8.5. Processor is a 2.6 GHz i7, and it has 8 gigs of memory.

 

As a test, I ran the standalone version I had installed, which is probably a couple years old, and it runs much faster even with other programs open. However it doesn't have the updates, DLC, or any saves, so I would love to get the Steam version running the way it used to. Any advice?

[JanH]

Jabberwok Hmm, that is odd. We're looking into this at the moment. In the meantime, we've set up a branch you can switch to that will allow address the performance issue on your machine.

• Right-click Mark of the Ninja on Steam > choose properties.
• Go to Betas and choose "previousbuild -" and close the window.
• Launch Mark of the Ninja

[Jabberwok]

Oops, I kind of forgot about this. I tried a level on the previous build and it does seem to have helped out. Areas with lots of guards seemed to run at or near full speed. I may try comparing the two as well. Thanks!