Whether your IT department locked down your Mac or you grabbed one from eBay that the seller forgot to “clean up”, you may encounter a big problem when trying to install software as a non-admin.
Here’s a possible workaround.
If you’re trying to install software on your Mac the first thing you should do is simply contact your IT department. They can use login to your computer remotely and installed the software for you. You may not like having to wait for IT but it’s not you’re computer so you shouldn’t install stuff on it. Also, you could unwittingly end up installing something that looks benign but is actually nefarious.
That being said, in an emergency there are two possible solutions:
Nov 03, 2011 Right click on Computer, and select Manage. On the left pick ' local users and groups'. Double click your username and on the top there will be a tab saying 'Member of'. Select it and make sure you see 'Administrators'. Select Administrator from the drop-down menu of account types. Enter the requested information: the new account holder's full name, account name, password, and password hint. Click the key next to Password to have the Password Assistant generate a password for you. Click Create User.
When you see the application installation login window you can either beg for the admin password or try a little workaround that I’m about to show you.
First see if you can just drag the app icon into the Applications folder.
If that fails, you could try Control clicking the app and choosing Open Package Details to see if you can modify the info.plist file or whatevever.
There was on old hack that worked on older versions of Mac OS X that let you modify a string in info.plist which effectively disabled authentication. Well I haven’t found a way to get this work in Mac OS X Yosemite so I’m going to assume it doesn’t work anymore.
One other possibility is to boot the Mac to Single User Mode and use the Directory Services Command Line tool to join your non-admin account to the administrator group.
Reboot and hold down Command + s until you see a black screen appear with a bunch of white text.
After a few seconds you’ll at something that resembles a Unix prompt.
First we need to mount the root file system so type
This mounts the root file system for read-write access.
Then type:
Replace <usernameToBeGivenRoot> with your non-admin username.
If you need to list the users and groups you can type:
Press Enter, type reboot and login with your non-admin account.
Ultimately, you shouldn’t try to “hack around” the password security mechanisms that prevent you from installing software. These features are here for a reason and unless you really know what you’re doing some of the tutorials out there can leave you with a broken PC and a chagrined look on your face when you call IT and they ask you what happened.
Note: If your computer is set to automatically log you in each time you start it, but you want to log in as another user, hold Shift when the Mac OS X Startup Screen appears and release it when the login screen appears. If you don't have access to an account with administrator privileges, contact your system administrator.