The easiest way to have your bash profile synced between several computers is by using Dropbox.
Just put all the contents of your current bash profile in a new file in your dropbox folder, for example ~/Dropbox/bash_profile_shared

Now open your current .bash_profile and enter this line on all of your computers:
source ~/Dropbox/bash_profile_shared

You can still have specific lines in the bash profile of the mac itself, but most quick commands can be shared around al your devices with this method.