Mov Files Too Big

So i've got a video project that i have to work on each month and the person who projects the videos needs them rendered/saved as .mov files with uncompressed audio. However when i seem to be rendering them out (have used both Premiere Pro & Media Encoder using his settings) the files still seem to be rendering at a size of around 1GB+, is there anyway of me reducing the file sizes when rendering as i know this is possible when rendering as .MP4; I'm also working off a macbook air if that helps as the file sizes being smaller would be much more useful for the minimal space on the laptop.