MacOS Sierra Upgrade — Folder Question Mark and Pinwheels
Reading Time: 2 minutes Problem After upgrading to MacOS Sierra on a Mid-2012 Retina MacBook Pro with an aftermarket OWC SSD, the “folder with question mark” icon appears upon boot, and intermittent pinwheels cause hard-resets/crashes — especially coming back from sleep mode. System heats up during charging. Things Tried That Did Not Work PRAM Reset SMC Reset First Aid with Disk […]