Your wife has excellent taste in input devices. I use the same trackball daily, and if I can't also find a solid Lion solution, I'll be heartbroken (not to mention much less productive).
History:
Kensington shipped four models of this type. The Expert and Turbo versions had slightly different coloring, and each came in wired and wireless versions.
- K64213 Expert Mouse Pro
- K64214 Turbo Mouse Pro
- K64245 Expert Mouse Pro Wireless
- K64240 Turbo Mouse Pro Wireless
The good news:
According to Kensington's drivers page, TrackballWorks™ 1.1 for Mac was released on Oct 19, 2011.
[Note: yes, that's TrackballWorks, not MouseWorks—the latter was last updated in 2009.]
The Installation/Notes file says:
Requirements:
Apple OSX 10.5.6 Leopard
Apple OSX 10.6.x Snow Leopard
Apple OSX 10.7.x Lion
Description: Enables trackball customization: button functions, pointer speed and acceleration, and scrolling speed and direction.
Languages: English
Installation:
Save the DMG file to your desktop and double-click on it.
Click on the installer package icon when it appears.
Follow the on-screen instructions to install the software.
The bad news:
I haven't been able to get it to work, and I'm not the only one.
Kensington support says:
TrackballWorks - Supported Kensington Devices
Which Kensington trackball models are compatible with the software application TrackballWorks?
Kensington TrackballWorks is compatible with SlimBlade TrackBall model K72327, Expert Mouse model K64325, Orbit Trackball w/Scroll Ring model 72337, and Orbit Optical Trackball K64327.
Note that all the supported models have numbers greater than K642nn.
Workarounds?
- There are some reports of success with TrackballWorks, so it's worth a try.
There are third-party mouse drivers. Some people have switched over to using USB Overdrive. I'm currently trying out SteerMouse, which makes the trackball work, but only has limited button support.
Neither focuses on supporting Kensington devices, or trackballs in general, which makes things problematic.
Uninstall the driver then try again, correctly
This has instructions, but I can't copy/paste them to here.
http://ww1.microchip.com/downloads/en//softwarelibrary/man-lan95xx/lan9500_lan9500a_lan951x%20software%20user%20manual%20rev.%201.2%20(05-01-09).pdf
Cmd/F to search, then search in the 'extra' box inside the page, not Safari's usual search box - for 'uninstall'
It will take you straight to the Mac uninstall page.
I got it… but I really hope you're not doing this on Yosemite… unless you have unsigned kexts switched off
MAC OSX Driver Uninstallation
Note: The device must be safely removed from the computer before beginning the uninstallation.
To begin the uninstallation process, open up a command terminal and enter the removal command sudo rm -rf /System/Library/Extensions/LAN9500.kext/
This causes the device driver to be removed from the operating system.
The final step is to remove the network entry that was created during the installation process. Click the systray network icon (top right corner of the screen) and select “Open Network Preferences...”
Best Answer
You'll need to contact the developers of the driver, and ask for a version that works on Catalina.
Catalina has introduced security features and changes to the way that third-party kernel extensions are handled.