crwdns2934241:0crwdne2934241:0 Dawn Wallis

crwdns2934249:0crwdne2934249:0:

hold Shift + D  simultaneously while holding the power key (to turn on the mac) for 10 or 15 seconds. Seems to work anytime it's necessary, which for me has been only after system updates in el capitan.

crwdns2915684:0crwdne2915684:0:

open