Okay, google comes through again!
http://macfortheblind.com/documentation
<http://macfortheblind.com/documentation>
This also mighte be helpful.
https://support.apple.com/kb/PH18384?locale=en_US
Also, NBP has a book out specifically for Yosemite. www.nbp.org
<http://www.nbp.org/>
Hth.
--
Cheryl
May the words of my mouth
and the meditation of my heart
be acceptable to You, Lord,
my rock and my Redeemer.
(Psalm 19:14 HCSB)