If you have access to the computer through the teachers account, all you have to do is throw out the multiple users control panel, multiple users extension and the prefrences, once you restart the multiple users are deactivated.
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Hi SardaIn order to upgrade your Safari you need to upgrade your OS to 10.4.11 at least.Try ebay for a copy. Once you have done that Software Update will automatically offer to update Safari to the latest version applicable. It's not the machine - it's the OS that matters.
I've never used a hair pin-- a straightened paperclip has always worked for me. One alternate solution (if you have another computer available) would be to boot the eMac into target disk mode by holding T during startup. It should show a firewire icon on the screen, and should act like an external hard drive when you connect it to another computer via a firewire cable. You can use this method to install the OS onto the eMac from another Mac. You can try Googling "Target Disk Mode" if you need more information.
If you are not concerned about any of the files on the computer, I suggest just wiping it and reinstalling the OS from the original software discs - this will ensure there's absolutely no issues with the files on the computer. If you are concerned about saving data, this could get tricky - as it sounds like you've moved something in the user that the OS needs to boot. If that's the case, there's an "archive and install" option when you go to install, more info on that here. When performing this archive and install, be sure not to check-mark the box that says "preserve users and settings", as the user is corrupted - what it will do is stick the user in a folder on the drive called "previous systems", and you can access the data later from the new user created during the repair installation.
In OS X, if you're the administrative (or only) user, you can reset the admin/user password using the OS X installation disk #1. Put the disk in the CD drive & restart the eMac while holding the "C" key down (Restart is also on the Apple menu, top-left corner of your screen). When the Installer opens, click "Utilities" then Restart. When the Installer asks you what language, pick one (maybe English?) 8¬), click continue (arrow) then Utilities again & choose "Reset Password"; the system will guide you through the steps. Once you've reset the user password, restart the eMac, then you can log in using the new password. You'll probably want to reset your "Keychain" password to match your new login password – otherwise it'll ask for your password every time it needs one for a program. "Keychain Access" is in the 'Utilities' folder, which is inside the 'Applications' folder.
—> Important: if the old Users Home Folder was encrypted ("FileVault" protected), you'll need the old user's password, or the eMac's Master password to access the files in the Home Folder – otherwise, the Home folder's files will be lost. As a new user, you'll have your own Home Folder & access to all application programs.
Strong Warning: You should only enable root if you really really
need it, really know what it's for, and realize the security
implications of enabling root! You can do everything you need to do
with "su do", so root is really not needed ... with that said, here's
how to enable it - please understand what you're doing and why before
you do this!
The "root" user (also known as the superuser) is the most powerful UNIX
account. The root account can do anything to any file or folder,
anywhere on the system. For that reason, it's considered quite
dangerous, and only needs to be used (occasionally) by advanced users.
Because of the dangers of operating as root, Apple has chosen to hide
the root account in OS X Final. However, there are a number of ways to
enable it. The easiest is to boot off the install CD, and look under
the Install menu for the "Password Reset" option. You can use this to
change your own password if you forget it, and to enable the root
account. This utility will not run if you copy it to your hard drive! It only works when booting from the CD.
Yes you need to start off the install disk, star off the install disk and it will come up to the installer window, depending on the version of OS X the menus will be different. Installer for 10.1-103 and Utilities for 10.4-10.5, select the Reset Password function and you will see a picture of your hard drive, select it and a list of users will appear and you can then reset their passwords.
With software and computers changing constantly-I use older software for older macs. You will continuously run into problems dealing with new software and old computers. See if you can find older versions that still run great rather than the creative suite. Stick with earlier system software as well. Now days 640 for memory is not much because of the increase in software space use. You can also allocate memory to certain software you use most.
An update would not prevent the machine from accessing a server, unless other changes in the machine configuration was made. If you are running Tiger (10.4) go tot he apple on the top left, 4 lines down is SYSTEM PREFERENCES. Under INTERNET & NETWORK, you want to select NETWORK. Location should be AUTOMATIC and SHOW should be NETWORK STATUS. From there you should see all the connections in the list below. Next to BUILT IN ETHERNET you should see a color dot either red green or yellow. If the dot is red but there is a cable there, then the cable has gone bad. If the dot is yellow and the cable is in the port, then your computer detects an acgtive signal but your configuration is incorrect, like your ip address is being used by another machine, If the dot is green, then your machine recognizes a stable and active signal. YOu may need to just reset your tcp/ip settings. There are a few more options like unplugging you router for a few seconds, or puling out the ethernet cable from the computer and re-inserting it.