Cannot transfer my 2015 tax forms to my new 2016 TurboTax for Mac. I can find the file, but it is grayed out and cannot be selected.

[DoninGA]

Only the 2015 tax data file can be transferred to the 2016 return when you start a New Tax Return for 2016.  Does the tax data file have a file extension of .tax2015?

[Critter]

Do you have the 2015 tax file on your computer?  It ends in .tax2015.  You need that to transfer into 2016.  First thing you do is start a new return and it should find all your 2015 files and ask if you want to transfer them.  
Here's how for Mac:
<a rel="nofollow" target="_blank" href="https://ttlc.intuit.com/questions/1901265-transfer-last-year-s-return-into-turbotax-for-mac">https:/...>

[jackomen]

This is what I tried to do, but the 2016 TurboTax would not open the .tax2015 file because it was displayed as a grayed out option.

[Critter]

You do not open the file you transfer it ... Read the instructions.