Such a basic question but this is an irritating problem for me. I have a 2015 fully maxed out macbook pro. I have only used a mac since 2013 so have no idea if I cause this issue or its a device problem. When typing with any speed, my text starts out a sentence just fine and then the words start inserting themselves somewher they dont belong, like at the beginning of the sentence or in the middle of a sentence I have already typed. To prevent this, I must make sure I keep my hands off the trackpad and type slower than what is normal speed for me. Sooo, is this just a trait of a laptop vs a desktop, is something wrong with my mbp or do I just need to learn to type better? And to give you some idea of my typing, I learned to type in high school on a manual typewriter and could type 80 wpm.