Hi there Felissa,
I appreciate you reaching out to us here in the Community. I'm happy to lend a hand.
JamesOng and alex247 have got it right. Upgrading your account to QuickBooks Mac 2016 would take care of the lockout issue.
If you're still running into this problem after you update, you may want to speak with an agent who specializes in Desktop support for Mac. Agents have the necessary tools to fix exactly what is causing the lockout. The number to reach support is 1-877-797-5806. The most recent contact information can be found here: https://help.quickbooks.intuit.com/en_US/contact.
You'll be back to business in no time. Keep up the great work and let me know if I can help with anything else.