Apple Event: May 7th at 7 am PT
I first encountered this problem in os 10.8 and when I installed 10.8.1 I thought it had been fixed because I booted 10 times without the problem occurring. However, it's back.
iMac10,1
But are you certain it's Linux? You keep referring to it as that, but Linux doesn't get installed by itself. My links refer to stopping booting in single user and verbose mode, not Linux.
I'm not sure it is Linux. The only reason I suspect that is that what is displayed looks like what I remember some of linux console messages were like. Also, the whoami command works which is unix/linux but not necessarily exclusive to them. Maybe I should try some others that I can dredge up from memory. Also, it's my understanding that mac os is built on top of linux. But on the other hand I do see a message that says "Single user boot." So, it certainly could be that as well. Still have had time to check out your links, unfortunately. Maybe Kenneth can get to it before me.
I should also note that I have run the Verify Disk utility on the system disk and it has come up free of errors.
Yes, try...
exit
or...
mac-boot
Indeed that's what I do, BDAqua. Thanks for the note regardless. Actually, I haven't tried mac-boot, but I have used exit and reboot. Either of these gets the mac os going. But I shouldn't and don't want to have to do that. I want the machine to simply boot up into the mac os every time without all that single-user or linux or whatever-it-is stuff holding it up and making me wonder if something serious is wrong.
OK, try this in Terminal...
To return to a normal startup, execute this command in Terminal or the command line:
sudo nvram boot-args=""
It'll ask for an admin PW that won't be echoed, carefully type the PW & hit enter
Actually not sure that still works on IntelMacs.
Have you done a PRAM reset, CMD+Option+p+r...
http://support.apple.com/kb/HT1379
In fact, do 3 in a row, takes a bit of time.
Actually not sure that still works on IntelMacs.
Hi BD. If it doesn't work, he should try this, from the already linked article.
One of these settings is a boot arguments option that is passed to the OS kernel, similar to when keyboard hot keys are used. These can be set for verbose and safe modes using the following commands in the OS X Terminal:
sudo nvram boot-args="-v"
sudo nvram boot-args="-s"
Sounds like it's booting to single user, so I'd try the last one.
Great WZZZ, thanks! 🙂
I'm pretty sure those sudo commands cause verbose and safe modes to be used - not reset. So, I think they will just make the "problem" happen all the time. If I'm wrong, please let me know and I will try it out. But in reading the article referenced above by WZZZ, I did play around with sudo nvram. First I listed all the arguments and boot-args was not listed. I believe that means it has not been set and so that will not be the problem. I also tried to list it individually with "sudo nvram boot-args" and it was not found. I'm inferring from all this that boot-args is not the problem.
I have done the PRAM reset twice, once each with 10.8 and 10.8.1. I haven't tried three in a row though. I'll give it a try and see what happens.
Did you try the...
sudo nvram boot-args=""
I did, and for the first startup it worked fine. Unfortunately, with this problem I won't know for some time if it fixed it. Unless, of course, the problem recurs soon. I'll let you know when I know more about how it's working. Thanks for the suggestion.
I'm sorry to day it did not solve it.
It's sounding more & more light a bad PRAM Battery, has it been disconnected from AC power for any length of time?
No. I did move it to a new place, but it wasn't disconnected for more than a few hours. I do shut it down routinely, but it is still connected to AC. Also, the battery going right when I first installed Mtn Lion would be heck of a coincidence. Still possible though, I guess.
Why does my iMac boot in linux some of the time instead of Mac OS?
