I need to call LINEST in Excel 2011 for Mac, I would say - this was a detective story. My laziness, my curiosity, all was here! I had a homework from university course to use LINEST.
I even stopped trying to do so on MAC, because after googling I could not find any solution how to do it. (I have tried EACH AND EVERY combination of Fn Ctrl Alt Cmd Return!)
Finally, I found a solution here on stack overflow! I want to mention it again, as it was a long time I spent looking for the solution. I have spent 4 days outside of home, to use just windows PC where it is easy as a pie - F2, CTRL+SHIFT+ENTER.
If you want to check if I tell truth - go to HELP in Excel for Mac, type array formula, find LINEST and look at the solution combination!
The solution: select the range, press CONTROL+U and then press ⌘+RETURN.
Here is the link to the original post: Excel formulas giving #VALUE! error when ported to Mac
This doesn't seem to work in Mac Excel 2016. After a bit of digging, it looks like the key combination for entering the array formula has changed from ⌘+RETURN to CTRL+SHIFT+RETURN.
Select the range, press CONTROL+U and then press ⌘+RETURN.
Found a solution to Excel Mac2016 as having to paste the code into the relevant cell, enter, then go to the end of the formula within the header bar and enter the following:
Enter a formula as an array formula Image + SHIFT + RETURN or CONTROL + SHIFT + RETURN
- Select the desired range of cells
- Press Fn + F2 or CONTROL + U
- Paste in your array value
- Press COMMAND (⌘) + SHIFT + RETURN
来源：https://stackoverflow.com/questions/26605268/array-formula-on-excel-for-mac