A Watermark Maker for Pictures PLEASE (MAC)

[Le Tunisien]

Please i need a software to watermark,like puttin a signature to a BATCH of pictures like all a folder you know....a software for mac..if u cant find a free one at least a limited time trial one and Thank you!!
i couldnt find one , appreciated in advance thx!

[Solace]

I don't even know if they have programs for watermarks specifically...It would just make sense to open them all up in Photoshop and put the same picture (your watermark) as the top layer on all of them in the same area.