one thing really missing, at windows, open a folder with alot of pictures, you can choose thumbnail view, then just like a image browser, you can quickly go through what the images are and do some operations like delete, copy. under OSX, the closest way i find so far is too select all files and then double click to open it in previews. and at that mode, u can't delete it. I would really like a simple and quick image browser function. any idea?