Hello Matt,

My comments in Situ below:

> On 10 Apr 2018, at 5:31 pm, Matt Falvey <mmfal...@bigpond.net.au> wrote:
> 
> Hi I have a problem with my iMac (late 2012) which is running OSC 10.11.6, El 
> Capitan. I am trying to connect it to another iMac (late 2009) which is 
> running 10.10.5, Yosemite. 
> 
> I have Diskwarrior on the 2009 iMac and wish to use it on the 2012 iMac using 
> Firewire/Thunderbolt cable.  

Is this Disk Warrior 5?
Why don’t you install Disk Warrior on the 2012 iMac?

> 
> The 2009 iMac only has a Firewire 800 port and the 2012 iMac has a 
> Thunderbolt port. 
> 
> So I am using a Thunderbolt to Firewire 800 adaptor, which in effect has a 
> Thunderbolt plug (male) on a short cord and a little box that has the 
> Firewire 800 port (female).
> 
> I connected the Firewire 800 cable to the adaptor and then plugged the other 
> end into the 2009 iMac,
> 
> 
> When I restart the 2012 iMac and hold down the “T” key I get a grey screen 
> with a Thunderbolt and Firewire icon, but the 2012 iMac hard drive does not 
> show up on the 2009 iMac nor does is show on the disks in the popup menu in 
> Diskwarrior.
> 
> Any ideas as to what I am doing wrong? Or alternative ways of connecting?

Try:
1. Make sure the Target computer is turned OFF, The Host computer can be 
powered ON
 then connect the Thunderbolt to Firewire 800 cable. 

2. Start up the target computer and immediately press and hold down the T key 
until the FireWire icon appears. 
The hard disk of the target computer should become available to the host 
computer and will likely appear on desktop.
———

> I have only just bought the DiskWarrior app., the thumb drive only got posted 
> from the US yesterday. The instructions say I can create a boot thumb drive, 
> but then does not explain how to do. It also mentions having some type of 
> operating system on the Thumb drive which has me totally confused.

The drive itself contains other applications, as well as the Disk Warrior 
utility (in the Installer Items folder): DiskWarrior 5 Installer and (in a 
separate folder) DiskWarrior Recovery Maker. 
Use The DiskWarrior Recovery Maker utility creates a DiskWarrior Recovery Disk 
by copying a serialized DiskWarrior application and the system files from an OS 
X Recovery Disk to a suitable flash drive. Once completed, you will be able to 
start up from the DiskWarrior Recovery Disk to run DiskWarrior for maintenance 
or emergencies.

You need a blank Flash Drive - of at least 2GB, but I suggest 16GB: 
1. Connect the flash Drive.

2. I would Copy the ‘Disk Warrior Recovery Maker’ to your Mac's Applications 
folder 

3. When this is Run, the panel shows three buttons: the destination Flash drive 
(all data will be deleted); the OS X source (a recovery drive which show 
10.10.1 or what system it is); & the (Serialized DiskWarrior Application)

4. Make sure the right destination and source disks are correct, then click the 
‘Create’ button, a panel asks if you are sure, and warn you the time it might 
take. It might ask for your Administrator password.

4. It will only takes a few minutes to create the disk, it will appear on the 
desktop with the Blue Disk Warrior Recovery icon.

Then to Use this Flash Drive, you would need to start the computer with the 
Option Key held down, then select the correct disk from those offered. It does 
not appear in the list of disks in System Preferences > Startup Disk 
DiskWarrior Run from a Recovery Drive

There are also manuals, as well as a basic Read Me file.
The Manual should give you the above instructions or similar I would expect.

> 
> Take care.
> 
> Matt. 

Kind Regards,

Ronni

13-inch MacBook Air (April 2014)
1.7GHz Dual-Core Intel Core i7, Turbo Boost to 3.3GHz
8GB 1600MHz LPDDR3 SDRAM
512GB PCIe-based Flash Storage

macOS High Sierra 10.13.4


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