As you may have confidential passwords and information stored within your Keychain, OS X explicitly requires a password and it cannot be reset. This security feature is by design so that someone cannot maliciously reset your OS X password, log in and then find out all your other passwords for services such as online banking that may have been saved. If you do reset your user account password, OS X will have no choice but to create a new Keychain for your user account and any saved passwords for apps like Twitter will have to be entered again.
macOS Sierra and Later Not Listed in Mac App Store Purchased Tab, Updates Not Tied to Apple ID
The old Keychain will not be deleted but is inaccessible unless the old password can be provided. Guides Ebooks About Follow Contact. Hi, These articles might help. JJ, I sympathize with you because I've had probs where it seems like I'm just going in maddening circles too. But reading your post as a distant observer it is funny to see all the things you've tried with no success and the way you describe it, just building up more and more steam to blow off, and your going back again and again to try something else. It sounds so much like me. Hope some of the above suggestions help with your predicament.
Edited by britechguy, 30 August - PM. Redacted Serial Number. Posted 30 August - PM. Do you have access to the Apple-ID associated with the upgrade? If you can, use that Apple ID to log in and update to the latest version. For this to work, you must make a backup using Time Machine to another disk Instructions Here. Edit: This likely will not work so I put it in spoilers instead. Do you have access to the Snow Leopard install disc? It should have come with your iMac. Spoiler After you have made a backup using Time Machine , restart your computer and hold Command-R keys. You will see the Recovery.
Note that this image is from the latest version of macOS from Apple's website so yours will look slightly different as you are using Mountain Lion. From there, click Disk Utility, select your disk the top one, not the indented one on the sidebar.
Click on Erase tab. For the Name tag, fill in "Macintosh HD" without quotes. After you have erased your disk, click on Reinstall OS X. Once this has finished, you can use Migration Assistant to copy over your files from your Time Machine backup. Then, upgrade to High Sierra the latest version.
Posted 01 September - AM. Thanks for all your trouble however, I think things are resolved, more or less, finally. I'm sorry I didn't get here with this information before you took so much time and care entering your advice. Using the root user, you don't run into the mentioned problems entering folders that you don't have access to.
In the end, using sudo or the root user is mostly just a matter of preference. It turned out that there were too many files and folders which carried in their names without being related to the uid anyhow but only a few to none I don't remember relevant ones that should have been renamed. So I did it exactly as you suggest. I've updated the how-to accordingly. Thanks for your hint, Tim! Great discussion guys. I didn't mention it earlier, but I used sudo for this entire process as well. Also, with sudo, there's no chance I'll forget to disable root when I'm done.
I think Roman's exactly correct. It's usually a matter of personal preference. Anonymous says: Feb 03, AM. Yet another sudo discussion? But sometimes I tend to use the root account, especially when I have to use lots of admin commands - or write some how-to that should be easy to use. Another option, of course, is to use "sudo -s" or "sudo -i". This will turn your shell into a "root shell" so you don't need to enable the root user or hack in "sudo" again and again which can be quite annoying.
Anonymous says: May 04, AM. What modifications are needed for I have tested the above info in Snow, however I have a few users in I'm sorry but I can't test that because I don't have a machine running Tiger any more. Anonymous says: Sep 02, PM. Excellent article, thanks! I just used this on Just wanted to say thanks! The procedure worked just as described. The only thing I'd add is to reboot after all the chown-ing and mv-ing is done.
I logged into one of the affected accounts immediately after moving everything around and everything was wonky no Desktop, no Finder, etc. I'm guessing some processes got confused by the changed UIDs and needed a fresh start. Thanks for this, very handy. One thing to add is the chown call should be chown -h or if you have any symlinks then they end up beloning to the old userid.
I also changed the gid PrimaryGroupID to match and did the same thing for the chgrp call. Anonymous says: Oct 31, AM. For some reason, chown wasn't in my path and couldn't find it since the locatedb wasn't properly loaded. Took me a while to find it but wanted to make sure others could find it easily. Adding it to delicious now! Anonymous says: Nov 03, PM. Hi all, Anyone can help me with this? Anonymous says: Nov 18, AM. This one might be a little more complete.
Also changes owner of symbolic links. Also uses xargs to execute the chown command as few times as possible. Note I just did this on Lion. Roman says: May 23, PM. Finally, I've updated the guide according to your hint. Thank you! Anonymous says: Jan 04, PM. It's very important to use "chown -h" instead of "chown".
The link target may have a completely different uid. Right, I've changed the commands. Anonymous says: Jan 21, PM. After a restart it also changed automatically the ownership of the user's files?
OS X Mavericks: Creating an Apple ID
Or would this only change the user-id and nothing more? Thanks for any hints …. I doubt that this will work, but I haven't checked. Feel free to try and report back :. Anonymous says: Feb 11, AM. No, it's not sufficient. Anonymous says: Oct 03, AM. No problems here, but of course you should have an clone or a backup of your system and user stuff. This is a great manual! Since I wanted to have my System and Accounts on the SSD, but the working files "data" on the old drive, this was a real pain.
I didn't want to get rid of all user stuff on the old drive either, to have a fallback in case there were issues with the new SSD. At least for the main issues I'm now really happy. Anonymous says: Apr 06, PM.
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I have done this on SL, but now find that the user wont show up in the login window. I can manually type in my user name in the login window and that works. Anyone have an idea why this is? Alexey says: Aug 29, PM. There is no such problem with UID Anonymous says: May 24, AM. Changing to the root user worked up until I got to the Directory Utility. Please advise. Anonymous says: Jun 19, AM.
No problem at all - just use the sudo method In Terminal, type 'sudo -s' once, then begin with the rest of the guide. Be sure to use a different user account - not the one you want to change. You explained exactly what I was looking for. Works great under Lion. Anonymous says: May 30, PM. Thank you all for your useful comments! I've updated the guide accordingly. I'm glad if this how-to is helpful. Anonymous says: Sep 01, AM. This is a great walk through and has worked flawlessly a few times now. I was wondering if you think this would easily be implemented in a script with prompts to enter text username, mainly.
I'll be working on it regardless, but my skills aren't that fantastic. Anonymous says: Sep 01, PM. Glad to hear! Sure, writing a script for this shouldn't be much of a problem. But I'm currently extremely busy, so I'm afraid I can't help you with that atm. Anonymous says: Aug 23, PM. First of all this article is great! Everything worked flawless for me. I am also interested in changing the default GID for a user account.
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Can this same process be applied to change the GID? I haven't found a list of 'keys' that would apply here, but I haven't looked that far into Google either. I just thought I would start here since this is already a great article! Thanks in advance for your help! Glad to hear, thanks!
Just have a look at the output of "dscl. Anonymous says: Nov 12, AM. I'm trying to chown as root on Mac OS I thought root could do everything? Any ideas?