Firmware Update Fails on Intel-Based Mac

Most of the firmware can be updated and give your hardware new capabilities and features. Updating the firmware can even change the GUI and battery life. Apple provides such updates in various downloads for an Intel-based Macintosh computer system. But sometimes, you might observe abrupt system behavior or some error messages while trying to install them. This might occur due to partition scheme issues. You might need to erase all the data that exists on your Mac disk and then, repartition it.

In such cases, if you find your backup incompetent to restore the required data, you need to use Data Recovery Mac software to achieve complete data recovery results.

To illustrate this, consider that you try to install the firmware update on your Intel-based Macintosh computer. You fail to perform the task and come across an error message that resembles:

“ Unexpected error occurred (0); unable to upgrade firmware”

Alternatively, you might also observe that if the power button is held, the computer starts as normal after a single beep, but the firmware update fails.


The above issue occurs if your computer is using a partition scheme that is other than standard partition-scheme, for example fdisk. An Intel-based Mac computer requires GUID partition scheme to allow firmware update.


To troubleshoot the above issue, you need to first discover the partition scheme of your hard disk using Disk Utility. If it is not a GUID_partition-scheme, you can use any of these methods to install the firmware update:

If a bootable external disk is available that is using correct GUID_partition_scheme, you can use Startup Disk preferences to start the system from it. You can then apply the required firmware update to your Mac while start-up

You can start your system using Mac OS X installation disc and use Disk Utility to change the partition scheme of required number of partitions to GUID Partition Scheme. Erase the partitions, partition your hard disk and reinstall Mac OS X. Restore lost data from backup and if you find backup invalid to restore files and folders, use File Recovery Mac software. These are powerful Data Recovery Mac utilities that apply high-end scanning algorithms to recover lost or deleted data.

Stellar Phoenix Macintosh Data Recovery is an advanced data recovery application that provides safe and comprehensive recovery of lost, deleted or missing data. It supports Mac OS X 10.6 Snow Leopard, 10.5 Leopard, 10.4 Tiger, and 10.3.9 Panther operating systems. It is a read-only Mac Recovery utility compatible with HFS, HFSX, HFS+, HFS Wrapper and FAT file systems