7 (folder that contain other files if you use Prism 6).Note that this library folder is within a particular user's folder and it contains several items Locate this folder: /Users/(Username)/Library/Application Support/GraphPad/Prism/.Launch Prism and activate again, using the check-box "Activate Prism for all users on this Mac" in the third step of activation.Manually delete Prism license file (prism-license.qxt) in /Users/(Username)/Library/Application Support/GraphPad/Prism/.First, make sure you can view hidden files. This should be done by someone who is familiar with the Mac file system and who understands that there are multiple Library folders on the mac. Once you tell Prism you want to install for one user, you won't be able to switch to all users by installing again. MacintoshHD:Library:Application Support:GraphPad:Prism Tech details: This choice determines where Prism saves the serial number file. If you only use one account, then it doesn't matter which choice you pick, but if you check the option, you'll need to enter your OS X password. Don't select this choice unless you know an admin password. But in order for this to work, another dialog will pop up, and ask you to enter the OS X password for an account with admin rights. Check the option (with older versions, click Yes) to install for all users, even those that might be added in the future.If any one else logs into this computer using a different user account, he or she will not be able to use Prism (without activating again). Do not check the option box to install Prism just for the current user account (with the older versions click No).More details (but no overview) from Apple. Learn more about User accounts here and here. To see the users on your computer, go to System Preferences and choose Users & Groups. Even if no one else uses your computer, you may want one account for home and one for work, or one with admin rights and another without (more secure). This can be useful when sharing the computer with others, so each person has his or her own account. User accounts? OS X lets you set up several user accounts on your computer. Older releases of Prism presented the choice this way: As part of this process, Prism shows this dialog box: When you first run Prism on a Mac, you need to activate it to associate your serial number with your computer.