No BOOT after 10.8.3 UPDATE

I ran the update through my mac ..doing the regular software update..

I went back to 10.8.2 it works fine. I will not update to 10.8.3 until they fix this issue.

our issue in this topic is almost the same: https://discussions.apple.com/thread/4895074

i have a hdd installed in the optibay, and osx unmounts it every hour. a reboot helps, but the drive gets unmounted again.

i pasted logs in the topic linked above.

i will roll back to 10.8.2 that was working fine - 10.8.3 introduced changes to the sata bus

how do you roll back a minor update?

having the exact same problem after the update , running a mid 2009 mbp , i have a scorpio black HDD installed, that i had to downgrade the EFI firmware to 1.6 for it to work properly (known issue)

i have reinstalled the os to no avail

I have EXACTLY the same set up as you , MBP mid 2009 I have a Scopio Black Drive . Downgraded EFI to 1.6. I installed installed OSX 10.8.3 three from app store and my MBP locked up each time/would not boot . I finally got it working again. I reinstalled Original ML 10.8.0 from a USB. Have not lost any files or settings. It works fine, just need to update to 10.8.2 I think I will leave 10.8.3 alone until they fix the problem or until we find a fix for it. If I find a solution I'll let you know.

Mine turned out to be the graphics card..I think it was failing for a while...got a new card in there now and my mac is purring again!

i have to say , that i wont be holding my breath 🙂

we still have not got a fix for the efi issue with 1.7 , although im hearing some have has sucess with another sata cable from the 2010 model , i might have to give that a whirl

I have exactly the same problem.

I've a mid 2011 iMac with 12GB of RAM, and two hard drives, one Crucial M4 SSD and as secondary drive, the original 500GB hard drive.

Until the 10.8.3 update, the iMac worked really fine, but since this update, when I power off the iMac and a couple of hours later I power on, the gray screen with apple logo and the gray wheel appear.

Then, I use a 10.8.2 Time Machine backup and it back to work fine, so clearly it's a problem of the update.

The weirdest thing is that I know other users with the same configuration and they haven't this problem.

not a problem ,

thread link on mac roumors : http://forums.macrumors.com/showthread.php?t=729883&page=31

drop box of dmg : https://www.dropbox.com/sh/tqmr4w8gl49e1w2/sKwwRRf1XH