If you are using the Mac Home & Business CD/Download program you can only prepare W2s and 1099s using QEF - Quick Employer Forms.  At the bottom of the Welcome to Turbo Tax screen it should say Create 1099s for Contractors and W2s for Employees

Another way to get to the Quick Employer Forms QEF is to go to the Business tab - Continue
Select I'll Choose what I work on (if it comes up)
Top item Profit or Loss from Business Click Update or Start
Click Edit by your Business

Then either
Scroll down to Business Expenses
On Other Common Business Expenses, click the start or update button
There are two sections where you can start using the QEF for contractors or employees.
For contractors, on Contract Labor, click the start or update button
On the screen "Enter Contract Labor Expenses" there is shown "Create and file W-2s and 1099s online with TurboTax Quick Employer Forms." and a "Start here" blue highlighted link.  This will take you to the QEF website.

OR
Under Business Profile - Edit
Scroll down to Has Employees - Click EDIT
Then Create and file W-2s and 1099s online with TurboTax Quick Employer Forms. Click on  Start here