I was a Windows PC user for many (20+)years. I've since switched to Macs. The one and ONLY feature that I miss is the ability to use a single click to open a file or folder or run an application as a system wide preference. Having the most often used items on the dock is marginal in this respect. It's not really a substitute since by the very nature of a PC, I have to access many more items than can be placed on a dock. To my mind a dock with 100 items defeats it's (the dock) purpose. Whilst trying to find information on this single click feature in OS X I came across this thread with the last post being particularly condescending and blindly pompous. It reminded of the tone used when some people extol the virtues of Macs when compared to Windows PCs. It may seem trivial to anyone not familiar with the feature in Windows but to people like myself who suffer from RSI / CTS it can be a right pain ... literally. Imagine having to double tap everything, every time on your smart phone. Imagine having to double tap everything, every time on your ipad. Can you imagine having to double click to access items on the internet ? For those of us who have migrated from Windows and know of this single click feature, that's how antiquated this double click "feature" of OS X appears to be. If it can be implemented in Windows and IOS, if it can be implemented in the wider internet, why not also in OS X ? Why the reluctance ? In reality, the declining part that Macs in general and OS X in particular play with regard to Apple's business model, this issue is unlikely to ever be addressed. I can hope though. Please Apple, implement this as a preference pane choice so that I can increase my productivity and reduce, at least by a little, my frustration and my RSI / CTS pain.