How to make Alt+delete delete word in Mac Powerpoint?
Using KeyRemap4MacBook, you could add this to private.xml:

&lt;item&gt;
&lt;name&gt;Powerpoint&lt;/name&gt;
&lt;identifier&gt;private.powerpoint&lt;/identifier&gt;
&lt;only&gt;POWERPOINT&lt;/only&gt;
&lt;autogen&gt;__KeyToKey__ KeyCode::DELETE, VK_OPTION, KeyCode::CURSOR_LEFT, ModifierFlag::OPTION_L | ModifierFlag::SHIFT_L, KeyCode::DELETE&lt;/autogen&gt;
&lt;/item&gt;


Further details: 


Open KeyRemap4MacBook - Mis &amp; Uninstall - Open private.xml
Edit private.xml and Add the above snippet between &lt;root&gt; and &lt;/root&gt;
Go to the change key tab in the KeyRemap4MacBook and press ReloadXML
Then select the "Powerpoint" box under remapping