I'm running a 2ghz intel core duo, 2gb ram macbook with snow leopard installed. I recently bought a new HD and reinstalled snow leopard after the last one died. I use my macbook with my 1080p vizio. Before the display pane would show 1080P NTSC and PAL also in 1080I and 720. Now my options are limited to 1920X1080 59.9Hz and 60.0Hz. This is not cool. I don't know what one is interlaced or progressive! It used to be so easy now it's not! Please help!