After update my mac to 'El Capitan' everything worked fine, except my wireless antenna. I looked everywhere for a solution, and after a many tries, it finaly worked, using more then one solutions that I found at the same time, so I decided to create these step by step to everyone.
Installation of USB Wireless Antenna (chipsets RT2870 or RT3070) using the software 'BearExtender 5.4'.
- OS X 10.11.x (El Capitan)
Installation (software)
1) Remove workaround first - RESTART
2) Remove old files - RESTART
3) Install 5.4 (BearExtender) - DONT RESTART YET!
4) Connect the USB Wireless Antenna
Installation (driver)
5) Run EasyKext Utility
6) Drag RT2870USBWirelessDriver.kext to it - RESTART
Deactivation of the SIP (System Integrity Protection) Kext Signing Protection
7) Restart your Mac on Recovery Mode
- Restart and hold “Command” + “R”
8) Open “Terminal”
- At “Utilities” menu
9) Type “csrutil - -without kext”
10) A success message should appear:
- “Successfully enable System Integrity Protection. Please restart the machine for the changes to take effect.”
10b) An error message may appear (it’s OK)
- “csrutil: requesting an unsupported configuration. This is likely to break in the future and leave your machine in a unknown state.”
11) If the message on item 10 appears you may RESTART you Mac
Your USB Wireless Antenna is now working in your mac with “El Capitan”!
Enjoy!
I put all the archives required, including this 'step by step' in a .dmg file.
View attachment BearExtender 5.4 (El Capitan Ready for chipsets RT2870 or RT3070).dmg.zip

1Ralink RT2870 Wireless Driver 4.1.8.0 Mac OS X 10.5/10.6/10.7

rtusb_d2870-4.1.8.0.dmg

Mac OS X 10.5/10.6/10.7

4.1.8.0

10.03 Mb

21 Oct 2011

2Ralink RT2870 Wireless Driver 3.2.4.0 Windows 7/XP/Vista(all 32/64) Windows XP/Vista/Windows 7(all 32/64)

is_ap_sta_rt2870_d-3.2.4.0.exe

Windows XP/Vista/Windows 7(all 32/64)

3.2.4.0

30.42 Mb

15 Sep 2011

3Ralink RT2870 Wireless Driver 3.2.1.0 Windows XP/Vista/Windows 7(all 32/64)

is_ap_sta_rt2870_d-3.2.1.0.exe

Windows XP/Vista/Windows 7(all 32/64)

3.2.1.0

27.70 Mb

10 May 2011

4Ralink RT2870 Wireless Driver 3.1.8.0 Windows XP/Vista/Windows 7(all 32/64)

is_ap_sta_rt2870_d-3.1.8.0.exe

Windows XP/Vista/Windows 7(all 32/64)

3.1.8.0

37.0 Mb

31 Dec 2010

5Ralink RT8070/RT3070/RT3370 USB Wireless Driver 2.4.0.1 Linux

2010_0831_rt3070_linux_sta_v2.4.0.1_dpo.bz2

Linux

2.4.0.1

665 Kb

31 Aug 2010

6Ralink RT2870 Wireless Driver 3.1.3.0 Windows XP/Vista/Windows 7(all 32/64-bit)

ralink_rt2870_drv3.1.3.0.exe

Windows XP/Vista/Windows 7(all 32/64-bit)

3.1.3.0

27.44 Mb

17 Jun 2010

7Ralink RT2870 Wireless Driver 3.0.0.0 Mac OS X 10.3/10.4/10.5/10.6

rtusbd2870-3.0.0.0ui-3.0.0.0_2010_04_06.dmg

Mac OS X 10.3/10.4/10.5/10.6

3.0.0.0

10.03 Mb

6 Apr 2010

8Ralink RT2870 Wireless Driver 3.1.0.0 Windows XP/Vista/Windows 7(all x32/x64)

is_ap_sta_rt2870_d-3.1.0.0.exe

Windows XP/Vista/Windows 7(all x32/x64)

3.1.0.0

29.11 Mb

3 Mar 2010

File Name :

Linux

2.1.1.0

547 Kb

25 May 2009

10Ralink RT2870/RT2770/RT3070 Wireless USB Driver 2.2.4.0/1.2.4.0 Windows 2000/(XP/Vista x32/x64)

is_ap_sta_rt2870_d-1.2.4.0_va-2.2.4.0_ru-2.1.9.0_va-2.2.4.0_au_2.0.9.0_va-2.0.9.0_111108_1.0.6.0_free.exe

Windows 2000/(XP/Vista x32/x64)

2.2.4.0/1.2.4.0

37.06 Mb

11 Nov 2008

11Ralink RT2870/RT2770/RT3070 Wireless USB Driver 2.2.2.0/1.2.2.0 Windows 2000/XP/Vista

is_ap_sta_rt2870_d-1.2.2.0_va-2.2.2.0_ru-2.1.7.0_va-2.2.2.0_au_2.0.7.0_va-2.0.7.0_090508_1.0.4.0_nh.exe

Windows 2000/XP/Vista

2.2.2.0/1.2.2.0

16.40 Mb

5 Sep 2008

12Ralink RT2870/RT2770/RT307X/RT3572 Wireless USB Driver 2.2.1.0/1.2.1.0 Windows 2000/XP/Vista

is_ap_sta_rt2870_d-1.2.1.0_va-2.2.1.0_ru-2.1.6.0_va-2.2.1.0_au_2.0.6.0_va-2.0.6.0_081308_1.0.3.0_nh.exe

Windows 2000/XP/Vista

2.2.1.0/1.2.1.0

13.65 Mb

13 Aug 2008