Can I boot in 32-bit mode?

MacBook Pro 17 "(8,3) i7 2.2 GHz Quad Core 16 GB DDR3 750 GB HD OS X Mavericks 10.9.5"

I am trying to connect to a USB 1.1 device which has incompatible firmware with 64-bit OS X.  The camera manufacturer's instructions for a workaround that allows access to the device to update the firmware, providing support OS X 64-bit.  Of workaround requires me to start in 32-bit mode by pressing the '3' key and '2' during the start cycle.  They show how to check and see if your Mac is in 32-bit mode, but their example does not match my window, and my machine doesn't seem to be in 32-bit mode.   I found several references to this '3' start + "2" keyboard shortcut, but nothing official from Apple.

Please do not recommend upgrading the OS.  The software I'm using is not supported by the manufacturer past Mavericks.

Thanks in advance for any help.

If the software is compatible with the Mavericks like you state that the developer shows you should be able to use the device in 32 or 64 bit.

When using any modification of the startup of the suggestion of anyone on the internet always proceed with caution, and damages are exclusively your own:

Method 1: Start key combination
This will bypass the default mode and use a different mode for single session.

  • If your Mac uses the 32-bit mode by default, press 6 and 4 at startup
  • If your Mac uses 64-bit by default, press 3 and 2 at startup

Note: Your Mac will return to the default mode the next time it starts. Method 2: Setting disk
This will change the default mode used by your Mac when starting. For 32-bit mode, use the following command in a Terminal:

  • sudo setkernelbootarchitecture systemsetup - i386

For the 64-bit mode, use the following command in a Terminal:

  • sudo systemsetup setkernelbootarchitecture - x86_64

Tags: Notebooks

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