I have a 13" 2013 MacBook Pro that has El Capitan and Linux mint. I decided to update my MacBook and when it finished updating I restarted it. It ended up booting up Linux. I held alt to go into the boot menu and it only showed one disk and every time I booted it it was Linux mint. I went into recovery mode and tried the first aid on the disk but there was an error. I went on some forums to resolve the issue and one of the suggestions was to do cmd + alt + p + r. I tried it and now every time I turn on my mac it comes up with a blinking folder with a question mark on it. I can't even go into recovery mode; it's just a white screen. Please help