I gave up and have to pose the question here. When we download new pictures in Windows and saved in a folder, we simply view it using Window Picture Viewer, scroll along and delete pictures we don't want. Easy and straight forward. I did the same saving all new pictures in a folder. Then problem arrises: 1) When click the 1st picture to commence viewing, its not able to scroll to the next one. unlike Picture Viewer. So does it mean I have to open up individual pic, close, move cursor to next pic, open, delete unwanted pic, close, move cursor to next ....repeat....repeat.....one by one at a time. That is mind bogging absurd. 2) Then I use space bar and able to scroll forward. When reach the last pic of the row. it stop, Then I have to move cursor down and now scroll backwards. Seems very strange. Its kind of zig-zag manner. And after deleting pic, I have to start all over again instead of continuing from last pic. Again this is crazy. I haven't really explore iphoto yet but don't tell me to use iphoto to do the job. That means I have to import photos from folder to iphoto and that is double job. Not forgetting there is no "cut and paste" function at right click mouse and that also means duplication. Surely Mac is meant for graphics and there must be a much easier way than Window Picture Viewer, right? I almost pull my hair out. Tell me that I'm missing something.