Yongur
Level 1
(0 points)
Q: Gray screen with stuck progression bar when updating to 10.11.3 ... suggestions?
My screen stays gray with the progression bar stuck on this update... suggestions?
Mac Pro 2012 (5.1)
Mac Pro, OS X El Capitan (10.11.2), Mac Pro 5.1 (2012)
JimmyCMPIT
Level 5
(7,841 points)
installing the update or you finished the update and it's rebooted before?
if this is the first install and it's stopped progress on the install wait detach all external devices from your computer with the exception of Mouse and Keyboard. If the computer responds you will need to determine if one of the external devices is causing the problem. If disconnecting those devices does nothing reboot and reset the VNRAM with those devices disconnected.
https://support.apple.com/en-us/HT204063
If OS X 10.11.3 was already installed successfully before this time and you can't get past the gray screen now you should reboot in safe mode
Try safe mode if your Mac doesn't finish starting up - Apple Support
if it fails disconnect the external devices as recommended above and repeat the process.
If the computer restarts in safe mode but not normal boot with those external devices disconnected you may wish to provide us with an etrecheck report to determine if any software is causing the issue.
Likely software reasons are any third party application for "cleaning", "keeping" or otherwise "anti-virus" packages which are known troublemakers on mac OS and should be uninstalled. Mac AV is not Windows AV, it is unnecessary at this time and has been cited as being a the root cause of system incompatibility and offers no real protection.
