Metadata loss after export ???

[azezelic]

I am fairly new to all of this so I must have done this inadvertantly somehow, but I have noticed that all metadata is lost after exporting pix from Lightroom to iPhoto ?!?!
Can anybody pls. help ?!?! Thnx

 

[KmH]

Download this, if you haven't already - http://helpx.adobe.com/pdf/lightroom_reference.pdf