It's quite simple, though not at all intuitive. If you type an f immediately after letters that you want to conjunct to others, it will conjoin the letters (this will not work with a succeeding vowel, obviously, only with consonants).

There is a guide here with other helpful tips on using the Devanagari QWERTY keyboard on the Mac: 
http://deimos3.apple.com/WebObjects/Core.woa/DownloadTrackPreview/emory-public.2595939314.02595939325.2618536082.pdf

Hope this helps!
-sundari


--

Sundari Johansen Hurwitt
PhD Candidate, Asian and Comparative Studies
Department of Philosophy and Religion
California Institute of Integral Studies, San Francisco



On Sat, Jan 31, 2015 at 10:38 AM, Patrick Olivelle <jpo@uts.cc.utexas.edu> wrote:
Dear All:

It is very convenient to type Devanāgarī on a MAC using the Devanagari - QWERTY keyboard. There are some conjunct consonant, however, that are difficult to obtain. One especially frustrating one is the half-y when there are more than one consonant before it, especially in Pages and even in TextEdit. Is there a way to put a half "y" after such consonant clusters manually rather than depend on the QWERTY? Thanks.

Patrick



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