I've bought and downloaded the Magic Picker 2 color wheel extension for Photoshop, though when I try and install it via the Adobe Extension Manager, I get the error message "You do not have the appropriate permissions required to perform this operation. Contact your system administrator to obtain permission".
Would be very grateful for help with this.
Are you running your computer on a network?
If so you would need your system administrator to make changes to the configuration of your computer including installing add ons.
If not is your machine set up so you are a user rather than an administrator. If this is the case log out and log back in to the machine as an administrator, Then install.