Obviously the iMac will still never boot off 10.5. My MacBook Pro which dates from 10.4.7 days is now booted off that partition as the iMac is in Target mode. If you’re not familiar with FireWire target disk mode it transforms a Mac equipped with a FireWire port (either 400 or 800) into an. I installed via target mode 10.5 retail onto a second partition of my iMac 11,3 which can't boot anything older than 10.6.4. FireWire target disk mode has saved my bacon countless times. * A compatible installer would be a newer retail, up the limits of machine's B hardware or the original installer for machine B which if lost can be obtainable from AppleCare. Machine B should now be able to install that operating system on machine B. Use the Option key, when possible instead of 'C' key to boot discsĥ. Tell machine B to go into the startup manager. Insert the compatible installer CD for machine B in machine A's optical drive.ģ. Put machine A in target mode by holding the T key. However, they may be used in this sequence to install an older operating system.ġ.

Macs in general can not boot off an operating system older than they are. PowerPC Macs can only boot Mac OS X off Firewire or internal drives. Some malfunctioning optical drives can be repaired simply by replacing the PRAM battery. Be very careful you obey the sequence here. When you have a malfunctioning optical drive, and an optical drive based operating system you can use Target Disk Mode as a substitute. Thunderbolt Macs may have the same capability with Firewire adapter, though this has not been tested here.

We can see the option offered by macOS to access and perform multiple backup tasks at disk level.Target Disk Mode is available to all Macs with Firewire.

To achieve this we must connect the two computers normally and boot the affected Mac computer, target, in the destination disk mode.Īfter this, we proceed to restart the host computer and there enter the 'Startup Manager' by pressing the 'Option' key while the boot process is carried out, with this, it will be possible to see the Mac destination drive in the menu of Start, there we will select it and we will have access to the information for its respective recovery. With the destination disk mode, it is allowed to use a Mac host to boot the operating system from a target as if it were this, with it it will be possible to restore access to the computer with error to retrieve its information. This is another of the useful options of the destination disk, allowing us to access a computer that has some hardware failure such as its destroyed screen, corrupt keyboard or other failures. How to run the operating system of a macOS target on the host

Target disk mode mac