Currently Being ModeratedSep 2, 2012 1:46 PM (in response to BDAqua)
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.
Currently Being ModeratedSep 2, 2012 1:58 PM (in response to Fred Ochs)
I agree, a bit too much of a coincidence, but we're running out of ideas!
Currently Being ModeratedSep 2, 2012 2:15 PM (in response to BDAqua)
I'm not buying the battery either. Two of us at once after the update? Don't think so. Yesterday a new symptom. On power up I got an error message that said an error had ocurred on boot and the system had to reboot. It did this on it's own and then reported the error had happend (upon reboot) and did I want to generate a report and send it to Apple. I clicked yes, the message disappeared and I never got the report and I don't it went to Apple either. That has not recurred but today it's back to the same problem we've been discussing. I do have a few other minor symptoms just in case they mean anything. First when I have the mail program open the cursor occaisionally disappears from the screen. Have to drag away from the program to make it reappear. When I click send to send a new message it takes a few minutes before it actually gets sent. During that time the new message is nowhere to be found. Not in Drafts or Sent folders. I also seem to be loosing Bluetooth Keyboard connection briefly fairly often. (2 or 3 times a day, batteries are fresh) The Magic Trackpad doesn't seem to be affected. Almost wonder if the Bluetooth in Mountain Lion and the keyboard are causing some sort of odd command to occur during boot. The mystery continues.
Currently Being ModeratedSep 2, 2012 2:47 PM (in response to Fred Ochs)
This one should clear it and restore the boot defaults. Although a PRAM Reset should have as well.
sudo nvram -d boot-args
Hit return and give admin pword when prompted. You won't see it as you type it in, then hit return again.
Try a PRAM Reset again, but this time let it chime away a good six times.
If this doesn't help Verify Disk in DU should be your next step. Or boot to Safe Mode. Hold Shift down at startup chime. Give it much longer to boot than normal; it wil be checking and repairing the volume directory, if necessary.
Currently Being ModeratedSep 2, 2012 3:20 PM (in response to WZZZ)
I did all of the above, WZZZ, at various times. I didn't let it chime 6 times as it would not after 3 and booted up into Mtn Lion. I could try that again. Done the verify disk twice and no problems. I have seen a bit of the keyboard disappearing as Kenneth described, but have ignored it. I also noticed the funny mail behavior but thought it was unrelated and so far just a sligh nuisance. But it looks like he and I are very much in the same boat. I'm thinking it's time for a trip to the Apple store. I really appreciate all the advice and ideas. You all are great. If you have any more let me/us know.
Currently Being ModeratedSep 4, 2012 11:44 AM (in response to Fred Ochs)
New observation that probably isn't related but who knows? I started Pages for the first time and was informed there was an update for it. I had previously checked for updates (almost everyday) but when the "Checking for new software message" appears it just seemed to keep running in a loop so I would close the page. Did the same thing when I clicked the update button on the message inside of pages. Finally just decided to let "Checking for software" run for as long as it took. Came back to the computer about 15 minutes later and low and behold there were updates for iPhoto, iMovie, iWork, and printer driver updates. I had previously updated Mountain Lion manually from the support site because I never saw it show up on update. If I had waited long enough I guess it would have shown up. Anyway, maybe the updates will cause something a little different during startup? No occurrences so far but it's way too early to tell. If it still happens I'm going to connect a hardwire keyboard and mouse to see if the bluetooth might be the culprit. When it happens it's definitely single user mode. I went and found a whole bunch of commands to try out. Don't worry I won't kill it. I ran fsck -fy and it comes out good. Ran it from single user mode that was purposely invoked and ran it from when it occurred unexpectedly with the same results. I'll report back if I find or don't find anything else.
Currently Being ModeratedSep 6, 2012 7:42 AM (in response to Kenneth Hayden)
Software updates had no effect. Switched to hardwire keyboard and so far it hasn't had a problem. Decided to try deleting my wireless keyboard and trackpad and then re-installing them. That didn't work either. Today I'm back on the hardwire keyboard and mouse. No trouble so far. My logic here is that something has to be inoking the single user mode at boot. I can do it with command s but something is generating that command without being told to. What can do that? Flaky wireless keyboard? Bluetooth driver? New Bluethooth driver and older wireless keyboard? The mystery continues.
Currently Being ModeratedSep 6, 2012 9:33 AM (in response to Kenneth Hayden)
I have the same wireless combination. Seems crazy, but you sure seem to be onto something. I don't have hardwire devices to try, unfortunately. Can't wait to read how your experiment comes out. If it does turn out to be related to the keyboard, I'm betting not hardware. The odds of both of our keyboards having the same hardware problem seems really remote.
Currently Being ModeratedSep 6, 2012 9:38 AM (in response to Kenneth Hayden)
There's a chance you may be on to something. There have been other threads on here where a few users Macs would randomly boot into 'safe mode' on start-up - not all the time, just occasionally. The 'fix' for that issue is to ensure that all Bluetooth devices are only switched on once the boot-up process has got past the Apple logo - better still once boot-up is complete.
Possible that BT could be behind your issue as well.
Currently Being ModeratedSep 6, 2012 10:29 AM (in response to Paul_31)
All that is related to unintended booting in Safe Boot, not single user, which appears to be what is happening.
Currently Being ModeratedSep 6, 2012 11:11 AM (in response to WZZZ)
True - still think it's worth a try
Currently Being ModeratedSep 9, 2012 8:28 AM (in response to Paul_31)
Ok, after a few days of normal use on the USB keyboard and mouse I'm becoming convinced there is a bluetooth bug in Mountain Lion. I'll give it another week before I "carve it in stone". It may be that it's only affecting the "older" equipment. I can't believe that Fred and I are the only ones who've seen this. Fortunately typeing exit or reboot to continue is only mildly annoying but we shouldn't have to do anything and I'm thinking at some point an update will probably cover this. I'll report back in a week unless it occurrs again with the USB keyboard.
Currently Being ModeratedSep 9, 2012 8:50 AM (in response to Kenneth Hayden)
When this happens, does it boot in Safe Boot or single user? The OP's issue is single user, not Safe Boot, and it is fairly well known that it will randomly boot in SB if bluetooth devices are on before booting up is finished.
Can you please clear this up, since it's not obvious from your posts which kind of boot this is.
(EDIT: But it does sound like single user if you have to type reboot to get out of it. There would be nothing to enter from a Safe Boot.)
Currently Being ModeratedSep 9, 2012 10:22 AM (in response to WZZZ)
I have been busy with yard sale and only had three opportunities to boot. Each time I waited for the apple to appear on th gray screen before turning the keyboard and pad on and each time it booted normally. I think Kenneth is right. I am not sure if it is single user mode or safe boot. How do I tell? I have noticed a message that mentions single user if that helps. This problem definitely started with Mtn Lion do I doubt it is the long standing one you are referring to. I, too, will report back in a week or so.
Currently Being ModeratedSep 9, 2012 10:54 AM (in response to Fred Ochs)
I am not sure if it is single user mode or safe boot. How do I tell?
"Safe Boot" will appear in red on the login screen. Other than that, it looks very similar to a normal startup. There is no text, as in single user.
Here is one example of single user. Note the root# prompt at the conclusion of the text.
single user accepts Unix commands from root, which means virtually unlimied access to system files and or modifications of system files. Similar to the root user. You need to know what you're doing if you enter any commands. You're completely safe with "reboot."