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Hello,
As some of you may know, Mac OSX provides by default mouse acceleration. It's not even customizable in the options, therefore mouse handling in games is pretty awful.
Fortunately, some software / piece of code exist to "disable" the acceleration (such as USB Overdrive). It worked pretty well for me on the desktop and some other applications, but NOT in Starcraft 2 
I know I can install Windows via Bootcamp on a Mac computer, but I'd really like to know if some of you may have found a solution, because it's totally unplayable right now.
Thank you all for your advice 
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Thanks but I already mentioned this tool and it doesn't work for me. The acceleration is reduced but still present. It's not good conditions to play competitively at all.
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Whoops, PM me and we'll see what we can do
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i wont be solved completely by any software... use boot camp!!!!
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Maybe play around with the settings a bit, mine works perfectly with USB Overdrive.
If you want to see how I have mine set up, here's a screen shot of my settings page, just adjust speed to your preference:
Link: http://imgur.com/eNavf.png
Other than USB Overdrive, there really isn't any other good solution, trust me, I searched for a long time for any alternative.
Good Luck!
EDIT: If it works fine in the desktop, then try adjusting the sensitivity from within the gameplay section in the SC2 options, maybe some tweaking on both the software and SC2's end will solve your problem.
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If you can't get USB Overdrive or similar to work, or don't want to mess with it, there's a Terminal command to disable acceleration.
defaults write .GlobalPreferences com.apple.mouse.scaling -1
You'll need to log out and back in for it to take effect, then it's permanent.
USB Overdrive definitely should work if you configure it correctly, though.
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I've been testing this very thoroughly and I'm about 90% sure that using USB overdrive it's possible to get 1:1 movement now.
Using USB overdrive, set acceleration ON and put the slider to the lowest setting. Adjust sensitivity as required. Set SC2 to 50%. I am 100% sure that turning acceleration to OFF still has acceleration.
With sc2 set to any setting other than 50%, for some reason it appears to add acceleration or have negative acceleration. I tested it quite a bit and I'm not sure why, but the results were pretty clear.
I tested it using a jig I made to constrain the mouse cursor to a specific area and was able to measure the exact distance traveled. That allowed me to just manually adjust the speed in the defined area. With acceleration OFF I was able to travel the entire screen with the cursor using an arbitrary amount of mouse distance traveled by simply varying the movement speed. That means there was an upwards acceleration curve. With the acceleration setting ON and set to minimum, changes in speed were inconsequential in changing cursor distance traveled. It only varied with physical mouse distance moved, which means the action was 1:1 or very close.
This does NOT emulate windows unless you are used to using the 1:1 registry settings with speed set to 6. Given that it feels very, very similar.
Hopefully this helps someone. It feels weird at first, but it gets much better really quickly.
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I had to create a script that disables acceleration after a delay of about 10 seconds. I "tab" out of SC2 (Command+M), initiate the script, then jump back into SC2 before the end of the delay.
I have to do this every time I focus on an application other than SC2 and every time a game starts.
I'm considering just having the script run every ten seconds so I don't have to dick around with it at while I am playing at all.
Why the hell the SC2 developers decided it was a good idea to reset acceleration curves is beyond me, though I'm guessing it is more of a limitation of the Mac OS X libraries, and their lack of mouse acceleration adjustability.
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United States11637 Posts
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EPT
