One of the great things about Final Cut Pro X ($299 on Mac App Store) is that you can export high quality videos extremely fast, even on underpowered hardware. For example, my Late 2013 MacBook Pro with Retina display lacks a discrete GPU, but I can still export 4K videos with relative ease.
Some of the speed can be attributed to a technology of Intel’s called Quick Sync Video. Quick Sync is a hardware accelerator for H.264 encoding. It’s baked into Intel’s consumer line of chips, so ironically, it doesn’t apply to the beefier Mac Pro. Those machines are powered by professional grade Xeon chips that lack integrated graphics.
That means that even the 12″ MacBook, which is the most anemic piece of Intel-powered hardware currently available from Apple, can export 4K videos competently.
With all of that said, there are some things that you should know in order to fully take advantage of faster video encoding when exporting projects with Final Cut Pro X, and you can learn more in this post.