Financial Software Questions? Ask IT Support for Answers ASAP
Hi there and welcome
I am very sorry about the delay you have had. Do you still need assistance with this?
Power off the mac
Then start the Mac and hold down the Command and R keys at startup.
Hold these keys until the Apple logo appears. After your computer finishes starting up, you should see a desktop with an OS X menu bar and an OS X Utilities window
choose Disk Utility from the Utilities window, or from the Installer menu if you're started from an installation disc.
Click the First Aid tab.
Click the disclosure triangle to the left of the hard drive icon to display the names of your hard disk volumes and partitions.
Select your Startup Disk (usually named "Macintosh HD").
Click Repair. Disk Utility checks and repairs the disk.
Let this complete and when it has, tell me if you still have the problem please.
My apologies, by the time you replied I was not online.
You will need to do a reinstall of Quickbooks.
Open Finder, go to Applications and drag QB to the Trash
Then restart the computer, install QB as you did when you first received it and it should then open.
Let me know please how you go