MacOS Sierra Upgrade — Folder Question Mark and Pinwheels

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 […]

OWC Aura Pro 6G 480GB vs. Stock Apple 256GB SSD

Solid State Drive upgrade options for the MacBook Pro with Retina Display have finally come down in price enough to make them a reasonably good value.  Here’s a performance comparison between the stock Apple drive and the OWC Aura Pro 6G: According to Blackmagic, the OWC Aura Pro 6G 480GB meets the advertised specification, but […]

GParted: Windows 8 Boot Camp Partition “Missing Operating System”

Problem After using GParted to resize an NTFS bootcamp partition, Windows 8 fails to boot with “Missing Operating System”. Discussion There are commercial utilities for resizing a bootcamp partition like Camptune or WinClone, but they are unnecessary.  Disk Utility will shrink the OS X partition to make space.  Booting to a Linux USB Drive with […]