Negative Positive
Title: Does not play well with Leopard
Review: Having owned and enjoyed a prior incarnation of a Kensington trackball when running OS9 on an older computer and in spite of some reviews on the Amazon site warning of problems using a Kensington device with OSX, I eagerly anticipated the arrival of my Kensington Expert trackball only to be bitterly disappointed. Even after downloading updated software, it is still "clunky", ergonomically clumsy and much less sensitive than the plain old Apple Supermouse which came with my computer and which can also scroll laterally. The buttons do not fall easily under hand and it does not respond well to OSX type commands. My only regret is that I was so sure that this was going to be a success, I did not save the packaging so that I cannot return it to Amazon. Save your money.
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