Make modem Huawei E397B work on Mac OS X

huawei_e397b.md

1. Install the Connection Manager that is launched when you connect the modem to the Mac
2. Download the source of usb_modeswitch from here http://www.draisberghof.de/usb_modeswitch/ (at the moment of writing this the file appears with the name usb-modeswitch-2.5.2.tar.bz2)
3. Run make in the directory of the source you downloaded
4. Run sudo ./usb_modeswitch -v12d1 -p1505 -X in the same directory

If the last step returns an error (I don't remember the error now, but I was getting an error related to usb_modeswitch not being able to take control of the modem to perfom changes):

1. Unplug the modem and plug it again
2. As soon as you plug the modem again, run sudo ./usb_modeswitch -v12d1 -p1505 -X repatedly until you get a successful result
3. Open Connection Manager and your modem is going to be detected

@nirmall I'm very sorry that I didn't reply to your question! I was having issues configuring the same modem on Ubuntu, so I came to my notes here to see if it was useful for this case too, when I noticed your comments. I never got a notification about it. 😞
I'm glad to know you figured out the way to solve your problem and thanks for adding more information which may be useful for people in the same situation 😃

It looks that it works as expected: isaacs/github#21 🤷‍♂️

@nirmall and @stefanocoding How did you guys overcome the PKG_CONFIG_PATH environment pitfall?

I have installed the pre-requisites though mine were via Macports. I have set the PKG_CONFIG_PATH environment variable to where the libusb.h is located but my make still fails with:

Package libusb-1.0 was not found in the pkg-config search path.
Perhaps you should add the directory containing `libusb-1.0.pc'
to the PKG_CONFIG_PATH environment variable
No package 'libusb-1.0' found
In file included from usb_modeswitch.c:59:
./usb_modeswitch.h:26:10: fatal error:
'libusb.h' file not found
#include <libusb.h>
^~~~~~~~~~
1 error generated.
make: *** [usb_modeswitch] Error 1

Any pointers?

@Kyshman you probably aren't going to get this notification, but answering your question: I didn't get that error. Maybe @nirmall can point you in the right direction, because he installed that package.
Anyway, I'm not sure if you have to set that environment variable when the libusb library is installed in the default location like /usr/local or /usr.

I got this error with commad :sudo ./usb_modeswitch -v 12d1 -p 1f01 -V 12d1 -P 14dc -J -W

libusb: error [darwin_claim_interface] USBInterfaceOpen: another process has device opened for exclusive access
Could not claim interface (error -3). Skip message sending

@LarkinZero that error is telling you that some other program is using the device. Maybe you have some driver or similar that is taking control of your USB device? If that's the case, you have to uninstall that driver or unload it, and then run usb_modeswitch.