DANA SUTTON  This is a great utility that allows very flexible use of Kensington mice and trackballs, but now that Leopard has been released it is very much in need of an upgrade to take Leopard's new features into consideration (example of what I mean: one click option could now be to cycle through Spaces desktops)  
(Version 3.0r1)

JOHN-ELI  I just need to say that at least for my setup, these drivers work just as they should.

I've used and Kensington trackballs since the Turbo Mouse 4.0 was a new product (deep into the ADB days), and the hardware has stayed great, in my opinion. The OS X software is no-doubt still less feature-rich than it was in an OS 9 version (version 5.x I think?), and I was very worried that this 3.0r1 version wouldn't work at all for Intel Macs, from the reviews here, on VersionTracker, and elsewhere. But for my Mac Mini Core 2 Duo, running 10.4.10, with the Turbo Mouse USB it works just fine.

It's as configurable & reliable as it was on my older PPC Macs. The acceleration works accurately, and the 'Slowly' and 'Quickly' thresholds are just where they should be, when I move the cursor slowly, it can really go VERY slowly, and ditto with quickly.

So I just wanted to say that my results actually installing it, were very good.

This, after fearing that it wouldn't work at all on Intel Macs, and thus trying USB Overdrive and SteerMouse, neither of which could do the very helpful chording feature that Kensington's MouseWorks driver can do (which adds 2 more button-functions to my 4-button trackball).

So you've kept me happy Kensington, though I'd love it if you could add some speed/acceleration options for the scrolling feature of my model trackball. I've had to settle for the Control-Drag feature in the fantastic program Saft, for great scrolling in Safari.

My advice is try it on your Intel Mac, if it doesn't work, use their good'n'simple un-install app included with the installer.  
(Version 3.0r1)

MACGIZMO  Unfortunately, Kensington's claim that it works with Intel Macs is bogus.

The driver does not recognize my TurboMouse Pro (the black trackball version) connected to my MacPro (OS 10.4.7) no matter which USB port it's plugged in to (including a USB hub).  
(Version 3.0r1)

CHRISCHRAM  I've used Kensington trackballs since the late '80s, but it looks like my Expert Mouse Pro will have to sit in the drawer until a MacIntel version of this driver is released. Please guys, get it out soon before I start to really love or really hate this Mighty Mouse.  
(Version 2.9)

DP-G4-450GUY  What’s New

MouseWorks version 2.5 adds support for Kensington Bluetooth devices, adds support for additional European devices, adds a menu bar status item for displaying the Horizontal Scrolling state, fixes issues with systems using a UFS formatted boot drive, fixes issues with low battery detecton on some wireless devices, and makes other changes to enhance stability.

MouseWorks version 2.5.1 contains a minor change to fix an issue where some users were not having their Kensington ADB pointing devices detected.

MouseWorks version 2.6 added support for new Kensington wireless desktop solutions.

MouseWorks 2.7 added support for new Kensington pointing devices, fixed an ADB pointing device problem, and removed incorrect Low Battery reports for Bluetooth devices.

MouseWorks 2.8 added support for new Kensington pointing devices and wireless desktop solutions, and fixed a Low Battery reporting error.

MouseWorks 2.9 added support for new Kensington pointing devices and wireless desktop solutions. It also fixes problems with Bluetooth support under Mac OS X 10.4.3 and later.

If you are using Mac OS X 10.3 Fast User Switching, you must use MouseWorks 2.4 or later, since earlier versions will get very confused.  
(Version 2.9)

DP-G4-450GUY  Per Kensington:

Kensington MouseWorks® for Mac OS X Version 2.9

Requirements:

Mac OS X (10.1.5 and later) including OS 10.3 (Panther) and OS 10.4 (Tiger)

MouseWorks 2.8 supports Kensington BlueTooth mice and trackballs. BlueTooth support requires a BlueTooth enabled computer running OS 10.2.8 or higher.

Description:

A disk image archive of the full version of Kensington MouseWorks™ software (version 2.8) for Mac OS X (including Panther and Tiger).

Notes:

This version supports all Kensington USB and ADB mice and trackballs except:

• One-button mice

• Turbo Mouse 1.0-4.0 (the older, 2-button models)

• Orbit 3D and Orbit Elite

• ValuMouse products

Please see the read me file included in this installation for important information regarding this release.  
(Version 2.9)

VERSANICK  Still don't know what the update does. I just went from 2.6 to 2.9.

However, with every Kensington mouse I've ever had (7 mouses on 3 different macs over the past several years), they all randomly will have the cursor fly to the corner of the screen (the top left corner, for instance) out of nowhere, upon slight movement of the mouse. I've gotten two of them replaced free of charge, I've re-installed software, I've brought them back, etc etc etc. It still seems to happen. It's not as common now with my Optical Elite, but it still exists once in a while.

Great product in general, and great ability to adjust acceleration and speed of cursor movement. Great product.  
(Version 2.9)

PECOS PETE  Works well for me, no problems so far. All previous assigned keys work as in the previous version.

Thumbs up!  
(Version 2.9)

ANONYMOUS  Using 2.8 on powerbook g4 with 10.4.3

For some reason, my usb trackball doesn't work everytime I reboot. I have to unplug - replug it in order that it be recognised... Any solution?  
(Version 2.8)

KOLLO  A+ Does what it suppose to do. No problems here.  
(Version 2.6)