This guide I have written myself so hope you like it. It is below.
Installing Mac OS X from a USB flash drive
This guide will show you how to create a bootable USB flash drive to
install Mac OS X. Here are the prerequisites.
A USB flash drive that's at least 8 GB in size. The installer and other
files take up at least this space.
A program called DiskMakerX previously known as Lion Disk Maker
available from
http://liondiskmaker.com/
The latest version of a supported operating system (Lion, Mountain Lion
or Mavericks) available from the Mac App Store.
Instructions
1. Download the above two apps listed in the prerequisites.
Important!
After downloading the latest supported operating system from the Mac App
Store the installer opens automatically. Do not proceed since the file
will be erased upon the reboot. Instead, press command-q at the first
screen of the installer where the continue button has the keyboard focus.
2. Open the DiskMakerX disk image in the finder. It should then appear
in the image browser. You can accomplish this by highlighting the dmg
file with just arrow keys and press command-o for open.
3. For reasons of better accessibility I then switch to list view with
command-2. Copy the only .app file in there and paste into your
applications folder. This is accomplished with command-c for copy,
command-shift-a to open the Applications folder and command-v to paste.
Once copied close all Finder windows with command-w so you're at the
desktop and eject the disk image by first highlighting it with just
arrow keys and press command-e for eject.
5. Connect the USB flash drive to your mac before beginning the next step.
6. Open the DiskMakerX which should now be located in your applications
folder.
7. When prompted that Safari has downloaded this application from the
web vo-arrow to the open button and press vo-space to activate. With
QuickNav enabled with left-right arrows together you can simply navigate
to the open button with left or right arrow keys then press up-down
arrows together to activate.
Note
By VO throughout this guide I am talking about the VoiceOver keys which
are control-option.
8. Follow the instructions on the screen. For example when choosing the
operating system click either Lion, Mountain Lion or Mavericks button.
9. When it comes to the USB flash drive part choose to have it create as
an 8 GB flash drive. You will be warned that all data will be erased so
make sure your flash drive is backed up somewhere.
Note
If you have previously made a bootable USB flash drive you can update
the volume here by clicking the appropriate button.
Tip
Since the application uses appropriate options as default buttons in
most cases, pressing return will be enough to move on to the next screen.
10. The preparation and copying will eventually begin. Do not worry
about any busy busy busy messages or that the app has no windows. It is
just doing its work behind the scenes. Please enter any credentials when
prompted. VoiceOver makes a clicking type sound when in password text
fields.
11. When all finished, you are invited to either open Start-up Disk
preferences so you can quickly change to the newly created or updated
bootable USB flash drive and test your creations. You are also invited
to make a donation to the developers which is in fact the default button
so pressing return will open your browser allowing you to make such a
donation. Finally there is a quit button which does what it says; quit
the application. Let's then click the open Start-up Disk Preferences button.
12. Interact with the possible start-up disks scroll area, choose your
bootable USB Flash Drive by selecting the appropriate radio buttons,
stop interacting with the scroll area and click restart button. To
interact and stop interact with VoiceOver do one of the following:
A. Press vo-shift-down arrow to interact; vo-shift-up arrow to stop
interacting.
B. Press down-right arrows to interact; down-left arrows to stop
interacting. This is assuming QuickNav is enabled with left-right arrows.
13. Click restart button again to confirm you want to restart the computer.
14. Your USB flash drive should now boot up and eventually display the
Mac OS X Utilities with the applications table having keyboard focus.
How long it takes depends on your USB flash drive. On my Verbatim 64 GB
USB flash drive it takes about thirty seconds.
15. To enable the whole operation to talk and output to Braille if you
have such facilities requires starting VoiceOver. To do this press
command-F5. You may hear a different voice than what you're used to.
This is because in effect a temporary copy of VoiceOver used for
installation and other purposes is running and so the voice is set to
Fred which runs on even older hardware. If using Braille only USB
refreshable Braille displays will be supported at this time.
16. To manage your disks including partitioning, select Disk Utility and
click continue button.
Important!
Should you wish to repartition your disk, please be aware all data
previously stored on the disk will be erased. Make sure you have a disk
backup somewhere.
17. Let's for example structure the disk so you have one big partition.
To do this:
a. Interact with the disks table and choose the topmost column which is
your entire disk and not just your start-up partition.
b. Stop interacting with the disks table, click the partition tab to
select it, choose 1 from the partition layout pop-up button and click
apply button. Interacting with a pop-up button involves activating the
item with either vo-space (up-down arrows if QuickNav is enabled), space
or return.
Note
The current option allows you to manage the partitions on the disk
without losing data.
18. Confirm you wish to layout the partition this way by clicking the
partition button. It will then go away and do its thing. This should
take a matter of seconds. You will even see it format the disk with the
appropriate file system and disk label which you can also choose before
applying the new layout.
19. When all finished quit Disk Utility with command-q and return to the
OS X Utilities screen.
20. Now it's time to install Mac OS X from the bootable USB flash drive.
So interact with the applications table, choose Install Mac OS X, stop
interacting with the applications table and click continue button.
21. It is now a matter of just following the on screen instructions.
Note
At the final step of the installer before it does its work, VoiceOver
appears to lose focus. You will know this as attempting to navigate will
only result in a ding. To get around this press VO-F2-F2 to open the
Window Chooser menu, down arrow to the Installer and press return. You
should now be able to select the disk you wish to install OS X on and
click the install button.
Important!
At the preparing to install screen, when it says about a second
remaining and it's at 99.9% the installer appears to hang. Do not panic
and certainly do not do a thing. Just walk away, grab your favourite
refreshments and before you know it the mac will suddenly boot to the
installer now stored on the hard disk.
I hope you find this guide to be of use. Any comments good or bad will
be very welcome. Thank you and happy reading!
--
Christopher Hallsworth
Student at the Hadley School for the Blind
www.hadley.edu
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