Hello all, I had a Macbook Pro that after 3 trips to the shop, Apple finally replaced with a new machine. Unfortunately the new machine came with the most suck ass operating system ever developed. It is enough to make me think about going back to Windows. The first one is the annoying security feature that many users have complained about, namely that opening any type of file from the internet generates a warning. I have tried using the terminal command with limited success but in the end I still have to give permission to open up each file and in a file with 500 photos, that is completely impractical. The second one involves Preview denying me permission to view files. I have loaded numerous .jpeg photos (from my camera, that I took,) onto my computer and if I try to open them in preview, it denies me permission even though the permissions list me as being able to read and write that particular file. I have been to the Apple store several times with this problem and each time, they claim they either know nothing about the problem (i.e I am the only one who has encountered it) or they just shrug and say it is a Lion improvement. So my question is, does anyone know how to fix these problems or better yet upgrade to Snow Leopard which did not have these problems but can no longer be downloaded from the Apple Store?