Kensington Trackball drivers won't work with Lion.
I have lost my varourite input device! My Kensington Turbo Mouse is now no more than a simple mopuse:one click and motion, no mutliple clicks, no click and drag, and no speed!.
With difficulty I got through to somebody to speak to, after failing to get the Kensington site to recognise that they had ever produced a Turbo Mouse, and he told me that the drivers had not been updated - I had found that out for myself, as I re-downloaded the latest, which told me that it could not find a suitable device, and that as it was a discontinued device (3 years old!) Kensington may not develop new drivers .
So what to do? Elsewhere, www.boastr.de/, www.plentycom.jp/en/steermouse, www.usboverdrive.com, have been suggested, but they all seem to be pointed more at mice than Track Balls.
Any other ideas. The Kensington web site is hopeless.
iMac 2.66 4MB, MacBook 2.2 4MB, Mac OS X (10.7), Epson 1290, Lyson cis,Epson 220