for a very strange reason i don't hear the batery low messsage on my mack book air 11 inch. when it goes to 10 percent. is there a specific seting i need to change? ```Sent from my iPad> > Click on the link below to go to our homepage. > http://www.icanworkthisthing.com > > Manage your subscription by using the web interface on the link below. > //www.freelists.org/list/macvoiceover > > Users can subscribe to this list by sending email to > macvoiceover-request@xxxxxxxxxxxxx > with 'subscribe' in the Subject field OR by logging into the Web > interface at //www.freelists.org/list/macvoiceover >