Mac laptops have a limited number of USB ports (and let’s not even talk about the 12-inch MacBook). The iMac's USB ports are located on its backside, making them awkward to access. In such situations a USB hub such as the Inateck HB7002 is handy.
The boringly named hub — compatible with Mac OS X 10.8 and higher —provides you with an additional seven USB ports. Its silver/gray hue makes it a nice aesthetic match with most Macs, and it's small enough to toss in a carry case when you're on the move. It's a USB 3.0 gadget so provides transfer rates of up to 5 Gbps (though the actual transmission speed depends on the setting of connected USB devices). It's also backward compatible with USB 2.0/1.1 devices.
The HB7002 is powered by the USB port on your Mac, so there's no need to install drivers or connect an external power supply. Built-in surge protection keeps your devices and data safe and supports hot swapping.
The HB7002 retails for US$49.99, but you can get it at Amazon for about $32. This price makes it relatively competitive compared with 7-port hubs from Xcellon ($55), C2G ($45), Belkin ($50), IOGear ($35), Tripp Lite ($32), Digital Innovations ($30), and Sabrent ($19).