Bearifi BearExtender Turbo High Speed 802.11ac USB Wi-Fi Adapter for Mac OS X (Not Currently Yosemite Compatible)

Tried this on 2 machines (desktop and laptop) that are running Win 8.1. It was simple plug and play drivers seem to have been included. Did NOT work on a windows 7 machine (might be drivers elsewhere but didn't look for them).It made a huge difference in the speed tests I ran when paired to my AC router (Asus). Very stable signal and showed other networks that were out of range with my built in WiFi cards.All in all very happy.

Also this device works with Windows 8.1 - It's connection quality is awful.music streamings stops occasionally, and upload is so bad, I cannot stream anything back to the internet or other home devicesI have 40 mbps internet, using speedtest.net with macbook's internal wifi adapter and PC with this device (bearextender turbo):macbook with built in wifi card:download - max (40 mbps)upload - max (40 mbps)pc with bearextender turbo:download - max(40 mbps)upload - 5-7 mbpsboth pc and macbook are placed side by side in 2 meters from Airport Extreme ac routerexcept this I experience occasional packets drop when listening music from DI streams it just stops from time to timeI dont understand how built in wifi card can be better than this expensive device.more than that - I tested speed using my iphone 5 - and both download and upload are max too.so my message to you:iphone wifi card is better than this device

Buggy drivers, does not work properly on latest version of OS X, takes ages for software updates to get released.

Pros:Better than your Macbook wifi antenna...sometimes.Will get you a signal nearby...50% of the timeWanna tap into your own wifi on the other end of the house? You're good.Wanna let your mother-in-law next door use your wifi? You're probably ok.Wanna tap into your hotel/rv park's internet with more reliability? Uuummmm...maybe. Sometimes yes/sometimes no. Don't count on it.Cons:Short cord...hope you plan to put your Mac in the windowProprietary cord? Or else hard to find. At least I've never seen a usb cord end like this.Want to use any wifi that isn't line of sight or is more than 100 feet away? Yeah....not gonna happen. It will NOT work.This thing sucks compared to my husband's Bear Extender, PC version, which was far cheaper, and that doesn't have a great range either.If it's not working well, try using your own Mac wifi antenna, because believe it or not, the BE can be finicky, and might actually work worse.Tips:If your Mac doesn't have a CD drive, you'll need to download the software from the company website. Not hard, but had to look for the link on the support page.ALWAYS turn your Mac wifi off first. If it's on, the BE won't work.Signal strength might say 94%, but that won't help you if the internet you're tapping into is super slow or has too many people on the network.You'll want a longer cord. Don't know if this is just proprietary or uncommon (at least, it looks uncommon to me). Maybe try a female to male usb cord to extend it?NOTE: Don't forget to turn off your Mac wifi when using this. If you don't, it's not going to work. So if it's not working, check that first. You'll have to go on the website to download the software if your Macbook doesn't have a CD drive (most don't). The installation was super easy, and once you have the download installed and your wifi off, it's basically just plug and play.I'm really disappointed in its range and performance, and very unhappy with the price I paid, given its performance, but I still find it useful sometimes when I'm away from home, which is why I gave it three stars.

i really like the Bear Extender Turbo. It is small, light, and works exactly as advertised. It gave my mac 802.11ac compatibility without having to buy a new computer.I like how compact the device is, and that it takes advantage of USB 3 ports for higher bandwidth (even though it is also USB 2.0 compatible). The USB cable provided is well made, thick and sturdy, but it is a bit too short. I'd love it if it had been maybe 6-12 inches longer, to improve the options of placement for the device.When running, it is fast, really fast, and the connection seems to me to be rock solid. You do need to install an application that must be up and running on your Mac in order for the Bear Extender to work, which is no big deal. It is best to make the bear Extender app run at startup, so that wifi will turn on as soon as the computer is done booting up, which is what I did.My only issue is the Yosemite drivers, which admittedly are in beta right now. They seem to be a bit buggy. The App froze on me at least 2-3 times, once so badly I could not reboot my Mac and had to do a hard shutdown. The other two times happened right after I switch my old AirPort Extreme for a new 802.11ac model. After that rocky start, everything seems to be going great, so, all in all, I'm very happy with my purchase. I think were it not for the short cable and buggy drivers, I'd give them a full 5 stars. And even so, the cable issue can be fixed by buying a third party one that is longer, and as far as the app goes, I'm sure they will improve the drivers as time goes by.