every file I create is executable?

I am new with freenas but not unix. I have tried to find the answer to this but just can't see it.

I primarily wish to access my freenas via a Mac or Unix system but also PC.

When I create a file I get really open permissions. e.g.
echo "c" > x.txt
gives --> -rwxrwxr-x+ 1 paul staff 2 Apr 30 09:42 x.txt

On my mac I get and would like

-rw-r--r-- 1 paul staff 2 Apr 30 09:38 x.txt

I must be missing something obvious, bu I just can't see it...

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