Hey David, we encountered this problem as well when adding the current x264 to VLC 0.8.6. The version of nasm installed on your Intel-Mac is outdated. You can easily install a suitable version by updating to Xcode 2.4.x or higher. Regards, Felix -- This is the x264-devel mailing-list To unsubscribe, go to: http://developers.videolan.org/lists.html