Anyone else's Mouse double clicking instead of single after upgrading to Mountain Lion?

Try turning off Spring Loaded folders. Things are 90% better for me for me now but it still happens from time to time.

System Preferences > Accessibility > unclick "Spring Loading delay."

Also set up preferences for mouse double click speed at 4 spaces from the far left.

Hopefully it will help!!

You need to reset you PRAM

Resetting PRAM and NVRAM

1. Shut down the computer.
2. Locate the following keys on the keyboard: Command, Option, P, and R. You will need to hold these keys down simultaneously in step 4.
3. Turn on the computer.
4. Press and hold the Command-Option-P-R keys. You must press this key combination before the gray screen appears.
5. Hold the keys down until the computer restarts and you hear the startup sound for the second time.
6. Release the keys.

It sounds like you have the double click speed set to low. Go to System Preferences > Accessibility > Mouse & Trackpad on list to left > move the Double-click speed slider to a faster setting.

Encountered this today. Absolutely maddening! I have found that doing System Preferences >> Trackpad >> Point & Click, disable Force Click and haptic feedback seems to have solved the problem. Hope it solves yours too.

- brian

I have the same maddening problem with my Apple mouse. It thinks a single click is a double click, which makes it hard to even select a file in Finder without the file opening, or to check a box (the instant double click unclicks the box). I can barely use the computer - I spend more time waiting for programs to open and closing windows that I don't want open. Menus pop open but instantly close.

I've been using Macs for 25 years, and this level of productivity brings me back to the days of my 8mHz Macintosh Plus - only this is more frustrating.

I have my system pref setting all the way to slow. It makes no difference whatsoever.

I'm using OS 10.6.8 (I have no idea if that is Mountain Lion, Sea Lion, Goat Lion, Snow Tiger, or what). Why does Apple refer to the OS as an animal, but then label the OS in the computer (ie "About This Mac") by number. Why do I have to look up what number Mountain Lion - or cross reference what animal my OS number is? << Sorry wrong thread.

I'm using an Apple mouse that says it is "Mouse". It has a clear top, white guts, no ball or button, perhaps it has invisible button areas, but I have no idea how to adjust or determine what they do or where they are. I suppose I should know what model the mouse is, but why should I have to surf the web to find out? Is it a mouse, mighty mouse, apple mouse, ultra mouse, magic mouse, mouse mouse? APPLE! Please give future mice (mouses?) a unique name or number - and print it on the hardware. My mouse and keyboard are wired. I'm getting wired too trying to fix this.

iMac7,1

Just typing this message is a pain. The mouse selects words when all I want to do is place the cursor.

A couple thoughts that come to mind:

1. Check the Accessibility settings in System Preferences. Perhaps there's an option in there that is causing this. Not just track speed, but other options that are there to ease use for physically disabled or challenged users (sorry if that's not the P.C. way of saying it).

2. Try creating a new user on the system, if the issue does not exist there, it's probably a corrupt plist file on your profile.

I would add that I have the same problem with my mouse.

The double click is not working, which is very annoying.

I cannot select a whole word inside a text.

I need to move the mouse over it while clicking on it.

I cannot launch an application such as opening a file with an editor.

I need to Right click and select Open.

I tried many things. I reinstalled twice ML, on a clean disk.

--------------------

I have a similar problem using the trackpad.

To open a file, I need to select the icon, not the file name,

and then click the icon with the bottom right corner.

This does not work very smoothly, I have to try several time.

Note: I have a late 2011 MacBook Pro 17"

I have the same problem with single clicks occasionally regestering as double clicks. I also use a Logitech mouse, so I thought perhaps the Logitech drivers were the culprit. It looks like they are. When I removed the Logitech Control Center from my computer (the uninstaller was located at /Applications/Utilities/LCC Uninstaller), the problem dissapeared. When I reinstalled the software, the problem returned. So now until Apple or Logitech issues an update that fixes the problem I guess it's a choice between losing our programmible mouse buttons, or dealing with random unexpected double clicks.

I've never installed the Logitech Control Centre, and the constant mouse click issue is so bad, I can't edit text, I can't move files, I can't even move windows without everything going awry.

I'm using wireless Logitech mice on a Mac Pro (at work) and an iMac (at home), both running OSX 10.8.2.

I've tried changing my double-click settings (no change), I've killed Better Touch Tool (the only mouse utitity I had installed, no change), I've run through system wide cleaning, repair and cache clearing via Onyx (still no change), rebooting makes no difference, and my computers are barely usable.

What in the world is going on?!

I've found this page to Logitech which mentions a malfunction of mouse with "Lion Mountain" and Adobe applications.

I've done two tests. An Apple mouse with very satisfactory result. And I downloaded this driver from Logitech. with a satisfactory result.

I hope something works!

So after trying everything, except smashing the mouse... I found an old mouse and swapped. It seems to work fine. I think the problem was the mouse.

And, by the way, the old mouse was labled "mouse", and the old replacement is labled "pro mouse"... the only difference is the Pro Mouse has black guts. And works.

NVRAM/PRAM in Mountain Lion DOESN'T hold mouse settings any longer...

And I have the same issue of single-clicks that THE SYSTEM thinks are double-clicks with any USB mouse I've tried.

It seems that it started after the last Combo Update or Security Update... I did them together...

Same issue here as Sergio Tezza. Dialog boxes in applications will pop on screen and instantly pop off, files will save as if I've clicked "OK", a file will open with a single click rather than a double click. Just did the Security Update on Monday and all these issues started happening. Anyone else? Any fix???

That doesn't help since I'm using a magic mouse, or mighty mouse or whatever it's called. I've tried all the settings in the mouse preference panel, I've tried reconnecting to the mouse. We have 2 computers here doing the same thing with the same mice -- one is only about 2 months old so I don't think it can be a worn out mouse. Any other ideas??? We are having SO many problems!!!

I am using OSX86 and Lion as it is the latest version I can run on my old Asus P5K3 Deluxe motherboard with Palit Gtx 460 video card. So the NVRAM reset is not my option.

I have a cheapest wireless mouse you can possibly imagine. It started to develop double click issues over time. I changed the battery with no improvement.

I carefully read trough this tread and tried Universal Access mouse option.

First I maxed it out to Fast and I could not even do a double click. Then I moved slider back to Normal and the problem seems to be gone.

I believe it has something to do with the click signal the mouse emits. It possibly is broadcasted too long and computer reads it twice.

Anyway, it is possible that the problem deteriorates or improves on its own.

In my case it has nothing to do with drivers. I regularly update my system HDD backup image and reverting does not solve the problem.

If you have a Bootcamp, try and repeat the problem under Windows to isolate the problem. Windows has double click speed setting too.