Q:

How do I share bluetooth keyboard with iPhone and iMac without re-pairing every time? 

This may be an impossible request, but I'm looking for some way, or some software to install, that lets me choose which device I want to type on at a particular moment.  
For example: Most of the time I am typing on my iMac.  But when a text message comes in, or I want to type a long password on my iPhone, I want to use my apple bluetooth keyboard to type on my iPhone for a bit, and then switch back to typing on my iMac. 

A:

try ikeyboard in the mac app store

