Modifying masterfile permission

Question

I have just switched to Aperture 3 and am trying to change dates on a phot and on the masterfile but get the following message:
"Aperture was not able to adjust the date and time of the master file because it is locked or you do not have  permission to modify it."
How do I overcome this?
Cheers
rowash

Answer 1

You need to maintain an Admin account. You don't need to use a Standard account. The only way to make the Standard account an Admin account requires that you be logged into an Admin account.
I suggest that you try changing the password on the existing Admin account so you can log into it:
Forgot Your Account Password
For Lion/Mountain Lion
    Boot to the Recovery HD:
Restart the computer and after the chime press and hold down the COMMAND and R keys until the menu screen appears. Alternatively, restart the computer and after the chime press and hold down the OPTION key until the boot manager screen appears. Select the Recovery HD and click on the downward pointing arrow button.
     When the menubar appears select Terminal from the Utilities menu.
     Enter resetpassword at the prompt and press RETURN. Follow
     instructions in the dialog window that will appear.
     Or see Reset a Mac OS X 10.7 Lion Password, OS X Mountain Lion- Reset a login password, and
     OS X Lion- Apple ID can be used to reset your user account password.
Once you have done that you now have access to use the Admin account. If you want you can continue to operate in your Standard account or you can log into the Admin account and change the status of your account to Admin. Then log into your own admin account and delete the old one.