reliable Mac-compatible Memory card reader

I use 4-32 GB SD cards almost exclusively with my Nikon AW100 point-and-shoot camera. I want to transfer photos from iPhoto to blank SD card using my MacBook Air(purchased Ot. 2012). I understand now that I cannot just drag-and drop images onto the inserted SD card. Instead, I m told I need a card reader plugged into a USB slot. What USB 3.0 SD card reader is most compatible with my MacAir? I don't mind buying a multi-format card reader for flexibility.

This will get the job done

Amazon.com: Plugable Aluminum SuperSpeed USB 3.0 12-in-1 6 slot Memory Card Reader (Including UDMA CF and UHS-I SD, SDXC, SDHC, MicroSD): Computers & Accessories

Why can't you drag files to a mounted SD card in the Air?

You should be able to. Do you get a error message when trying to drag the files over ? Also there is a lock slider on the side of most SD cards make sure its not on lock.