• Download Rd9700 Usb2.0 To Fast Ethernet Adapter Driver For Mac Air 1
• Download Rd9700 Usb2.0 To Fast Ethernet Adapter Driver For Mac Air Pro

Only US$4.99,buy KY-RD9700 USB 10/100 RJ45 Ethernet Network Adapter Dongle - Blue from DealExtreme with free shipping now. On the Mac, some information about the chips may be found with System Profiler, item USB. My adapter is LENTION 3 USB Port Hub + RJ45 Lan Adapter (USB 2.0 and Ethernet 10/100). The driver RealTek provides now (2019) is RTUNICv1.0.17. It does not work with Snow Leopard and/or chips in the adapter. We Promise Not to use your email for spam. And you can unsubscribe at any time.

The performance of the USB2.0 to Fast Ethernet is quite disappointing.
Figure 1. USB2.0 to Fast Ethernet
The Figure 1. shows the speed test result from www.speedtest.net using the USB2.0 to Fast Ethernet adapter. The maximum download and upload speed is about 6.5 Mbps. This is not due to the maximum capacity of the internet connection I use. As a control, I performed the same test through the same LAN port but with the built-in gigabit ethernet port in my laptop. The result is shown in Figure 2.

As seen, the speed provided by my ISP is much higher than 6.5 Mbps up and down. Hence, the extremely slow speed stems from the USB2.0 to Fast Ethernet adapter.
The theoretical data transfer rate of USB 2.0 is 480 Mbps. Assuming it can use only the half of it in practice, the adapter should provide the full speed of Fast Ethernet (100 Mbps). Thus, the test result is quite disappointing.
Appendix

Download Rd9700 Usb2.0 To Fast Ethernet Adapter Driver For Mac Air 1

Download Rd9700 Usb2.0 To Fast Ethernet Adapter Driver For Mac Air Pro

Test setting
Laptop: Sony VPCSA490X
OS: Windows 7 Home Premium x64
RAM: 8 GB
HDD: Samsung 830 SSD 256 GB
Driver: RD9700 Driver