This has been asked a lot. I can't get my device running with ADB on MacOSX. I know this is a software problem, because I can connect via the Samsung application Kies.
see
1) adb not finding my device / phone (MacOS X)
2) Android device is not recognized in adb
3) Why won't Eclipse/adb detect my Samsung Galaxy Tab device on my Mac?
Possible solutions of which none worked for me.
- start-server , kill-server
- USB-Debugging on?
- Add vendor ID to ./android/adb_usb.ini
- usb cable defect?
- add sdk path
- sudo kextunload /System/Library/Extensions/EasyTetherUSBEthernet.kext (?)
- Connect your device via USB hub instead of directly connecting to one of the usb ports on MAC.
details
OSX 10.8.0, Eclipse Juno (4.2.1), Android 4.0.3, apropriate SDK #15
Edit: Tried on Windows 7 also. Update firmware. Nothing working.