Chosen Solution
How to fix this? Every time when I turn on my macbook pro mid 2014 I have to choose my startup disk to continue with booting. It behaves as if I am holding the option key… However, the right option key doesnt work when I want to use it in the OS. When I turn on MP and hold the left option key it starts booting without the boot menu, when I do not hold it it shows the menu. When I hold the right option key there is no difference. I have tried apple diagnostics and it shows that everything is ok. Tried resetting SMC and PRAM and doesnt work. Running MacOs High Sierra
After booting, go under the Apple to: System Preference> Start up disk> unlock it> select your boot drive
