Twocanoes Software has launched SD Clone 2.2 (http://twocanoes.com/products/mac/sd-clone), an update of its tool to clone SD cards on the Mac.
It clones up to eight SD cards simultaneously from a single image file or SD card. SD Clone shrinks and expands the image as needed to fit your data on any size card. The app supports the Raspbian Raspberry Pi operating system, Linux and other operating systems.
SD Clone supports a variety of flash memory cards and formats, including SD and micro SD cards. Version 2.2 offers speed and other improvements.
SD Clone requires Mac OS X 10.9 or higher and costs $99.99. A demo is available for download.