I can't boot using a USB or get in by holding down 'D' on boot. I've tried scripts and terminal commands from various sites and absolutely nothing works.
diagnostics folder over to the local coreservices folder. Or use Option-D to start up to this utility over the Internet. I've tried creating bootable USBs and copying the. D: Start up to the Apple Diagnostics utility. For more information, please refer to the document "Installing ASD on a USB hard drive". If your Mac is using a firmware password, it ignores this key combination or starts up from macOS Recovery. ASD 3S117 and newer versions requires installation onto an external USB hard drive. Pressing the Command-R keys immediately after the startup chime will start up from the OS X Recovery System. This is of most use to businesses with a network of Macs. After running ASD (OS) or ASD (EFI), press the Restart button to restart the computer back into the normal startup volume, or hold down the option key to get back to the Startup Manager.ĪSD is no longer delivered as an image to be restored onto a DVD. Pressing the Option-N keys immediately after the startup chime will start up your Mac from a NetBoot server using the default boot image. ASD (EFI) will load in 20-30 seconds ASD (OS) will load in 2-3 minutes. To run ASD (OS) select the "ASD OS 3S123" drive icon and press return or select it with a mouse click. To run ASD (EFI) select the "ASD EFI 3S123" drive icon and press return or select it with a mouse click. With the USB hard drive containing ASD 3S123 plugged into a USB port, restart the computer and hold down the option key as the computer boots up into the Startup Manager. Before using Apple Service Diagnostic, disconnect any Ethernet network, USB, and audio cables.
#MAC STARTUP KEYS DIAGNOSTICS MAC OS X#
Apple Service Diagnostic (EFI) runs low-level tests of the hardware directly and does not require Mac OS X, while Apple Service Diagnostic (OS) uses Mac OS X to run tests.īooting and Using the Apple Service Diagnostic Application The Apple Service Diagnostic application is designed to run both EFI and Mac OS X tests from an external USB hard drive.
#MAC STARTUP KEYS DIAGNOSTICS SOFTWARE#
I found the following in a text file, and I would like to use the Apple Service Diagnostic Application from a bootable USB key but I cannot find where to download it or set it up? Also is this free software or does it require a separate licence? It sounds like it would be a useful tool for diagnosing Mac problems.