I've just loaded a live image of debian 8 into my USB, and everything works: (I tested function keys keyboard, trackpad, and brightness control). However, when I try to connect to the wireless, it says: firmware missing. So I searched and found that this page https://wiki.debian.org/MacBook/Wireless tells me to use the utility b43-fwcutter. I've detected and my chip is indeed a broadcom 4322X... So, how to use it? What version do I have to download and how to install it without internet? Do I have to download another dependencies? How to install them too?

Hi...

Have a look at this page. If your chipset is indeed the BCM4322, then running the following command should install the firmware on your system (after performing the previous steps listed)...

Let us know how it goes.

Regards...

but how if I don't have internet???

If your system has an ethernet port, you can connect your computer (via an ethernet cable) to your modem or router. Or use another computer and download the file and any needed dependencies here and save them to a USB stick. You can then trasfer them to your Macbook and proceed to install the dependencies first and then the firmware file by double clicking on them.

However, make sure the device ID number is "14e4:432b" before you begin.

Regards...

that's why I asked help, I don't know how to download them from another computer and install everything

First, make sure the device ID number is: 14e4:432b

Regards...

Hi...

You can check this by opening a terminal and running the following command...

Regards...

Thanks, I did it and the number is: 14e4:4353

this page contains a firmware that supports this board number, but in order to install it I have to do some things that require internet, could you help me? Macbook air does not have ethernet cable.

Hi...

In order to do this, you will need to find another computer that you can use to download and transfer the file(s) to a thumb (USB) drive. Unfortunately, there is no getting around that.

Once you are in front of this system, simply do the following...

1. Go to this page and download the firmware file to the Desktop and then transfer the file to your thumb drive.

2. Remove the thumb drive from that computer and then insert it into your Macbook. Wait for it to come up.

3. Debian may offer or automatically bring up the thumb drive's contents in a separate window. I'm not sure what it may look like but click whatever button that brings up the contents in a window. If nothing happens when you insert the thumb drive, you may need to search the file system manually and click on the drive to bring it up.

4. Find the firmware file and transfer it to your Desktop. I'm pretty sure you can just drag and drop it.

5. Double click on the firmware file, which will be a .deb file that the installer, gdebi, will process. When the install window appears, click the button the install the firmware. When it gets done, you can either reboot the system or run the following command in a terminal, as mentioned here....

6. Configure as needed and enjoy.

If you experience any problems, let us know.

Regards...

If you absolutely cant get it working, but you probably will with the advice given above, you can buy a new Intel wireless card for it. They are cheap, less than 30 dollars. The kernel comes with drivers for them already. just fyi.