howdee - im a new user, but registered for just this one long/detailed comment/reply..
a - if (when you type devalias xx yyy@yyyyyyyy) you receive a comment 'no alias' in response, then it did NOT work.. you should see a 'good' response of just the word OK.. even so, i was never able to 'use' my own devalias..
b - i noticed in one of the later-comments someone had tried just typing the word 'devalias' without anything else.. when i typed that, i got a nice long list of predefined aliases.. in particular, i could see one called 'first-boot' that looked like it should access my working tiger-hdd internally.. also, if i just typed 'boot' it would do what youd expect [boot from the first-boot device, which is the current internal hdd]..
- and i finally saw something good.. nb, i needed the exact-extra-characters listed [7 chars starting with / and ending with ] to get a 'good' dir.. and i assume others will have the devalias of 'first-boot' predefined like i did..
- was the magic incantation i used for getting to my external-usb-key [8gb formatted/dmg-restored as needed].. in particular, the '1:3' here on usb0 and the '0:3' with first-boot matched the disk:partition information i got when i looked at the key using the regular get-info command from tigers disk-utility..
![Getting Dmg From Install Drive Getting Dmg From Install Drive](/uploads/1/2/5/3/125374126/819197418.png)
i could do a more-detailed 'dir' on the key until i got to the ..CoreServices directory level.. i could NOT actually do a 'dir' on the BootX file itself.. but the CoreServices directory showed the 'magic' tbxi flag on that BootX file that i expected to see..
i could use the 'UP-ARROW' to repeat the last command that id typed, so that i could just change the 'dir' to a 'boot' and add the BootX to the end and it would work.. (using left- and right-arrows to leave the other good characters in place)
repeating: for me, the exact command i used was .. gl & hth, h.
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0 - THANK YOU to all who came before on this hint/thread/comment.. i am just standing on top of the giants before and adding my little comments for others..
Create Bootable USB Installer for Mac OSX Using TransMac. To create bootable USB installer for Mac to Install Mac OS X El Capitan on Windows, on Mac or VirtualBox, you have to create bootable USB flash drive. Let’s get started on how to do it. First, you have to download TransMac software for Windows and install it on your computer. Feb 23, 2018 AutoDMG will suggest a name for your image based on the current date and OS that you're installing. It also includes the correct file extension (.hfs.dmg) for DeployStudio. Authenticate with an admin account to start the build. AutoDMG will create a disk image, install OS.
1 - i could not make a windows-keyboard work.. in particular, my imac (g5) would 'ask' about it when powering up by having me press the key 'just inside of shift key' on each side.. thus, i was never able to make the keyboard-combo work correctly.. if you cannot get into open-firmware, then try getting a normal MAC-keyboard..
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2 - i was having all sorts of problems trying to get the correct device to use for the 'dir' command.. i could see the tree of information, but could never make a working 'devalias' for myself.. two clues:
3 - i was finally able to get things working better by doing/trying the following (details removed for hopeful-clarity):
Install Dmg Mac
![Getting Dmg From Install Drive Getting Dmg From Install Drive](/uploads/1/2/5/3/125374126/819197418.png)
4 - once i got my magic incantation correct, it took prolly an hour to get thru the first-boot - but eventually i got the great happy-mac sound from the other room.. hopefully you will be able to too.. :)
repeating: for me, the exact command i used was .. gl & hth, h.
If you are planning to install macOS Catalina, there is one additional set of steps you should follow. You should download a bootable copy of macOS Mojave. This is the only way to downgrade if you decide you're not ready for macOS Catalina.
Before you start
Getting Dmg From Install Drive File
Before you get started, make sure you have a thumb drive with at least 15GB of storage, or a spare external hard drive (one that you don't use with anything else).
You'll also need to download macOS Mojave from the Mac App Store.
Note: After macOS Mojave has downloaded, it will automatically begin the installation process. Close the installer instead.
Please, Please, Please, backup your Mac before you do anything.
How to format your external drive for Mac
You'll need to start with a clean thumb drive or hard drive in order to get it ready to work as a bootable drive.
- Plug the USB end of the drive to a USB port on your Mac.
- Click on Finder in your Dock to open a Finder window.
- Select Applications from the list on the left side of the window.
- Scroll down and double-click on Utilities.
- Scroll down and double-click on Disk Utility.
- Select your drive under External.
- Click on the Erase tab at the top of the window.
- Note the name of your external hard drive (probably 'Untitled') because you will need it when you create a bootable drive. If you have more than one external hard drive named 'Untitled,' you will need to rename your hard drive now.
- If your Mac is using HFS+, select Mac OS Extended (Journaled) from the format list. If your Mac is using APFS, select APFS from the format list.
- If Scheme is available, select GUID Partition Map.
- Click Erase.
- Click Done when the process is complete.
- Close the Disk Utility Weap dmg weap crit stamina eso. window.
Your thumb drive or external hard drive is now ready.
How to make your external drive bootable for installing macOS Mojave
Important:You will need to be in your Mac's administrator account in order to run the sudo Terminal command.
- Click on Finder in your Dock to open a Finder window.
- Select Applications from the list on the left side of the window.
- Scroll down and double-click on Utilities.
- Scroll down and double click on Terminal.
- Recall the name of your formatted external drivewhen entering the following text into Terminal. If it is not named 'Untitled,' you will need to change the command syntax for the pathname where it says: Volumes/Untitled. The name of the drive can't have any spaces and it is case sensitive.
- Enter the following text into Terminal (Don't forget to change the name 'Untitled' if your hard drive is named something else):Install dmg on mac. sudo /Applications/Install macOS Mojave.app/Contents/Resources/createinstallmedia --volume /Volumes/Untitled
- Hit the enter/return key.
- Enter your administrator account password. This is the password you use to make changes on your Mac or log in. No text will appear in Terminal when you enter the password.
- Type Y to confirm that you want to erase the drive and press return.
The process could take a very long time, depending on the drive. When it is done, the Terminal window will report 'Done.'
How to use macOS Mojave as an installer boot drive
Once macOS Mojave is installed on your external drive, you can boot up and install any Mac with the drive plugged into it.
- Turn off the Mac you want to install macOS Mojave with the bootable drive.
- Connect the external drive to your Mac via the USB port.
- Turn on your Mac.
- Hold down the Option key when you hear the startup chime.
- Select the external drive with macOS Mojave on it from the list of systems to start up your computer.
The installation process will begin. Follow the steps to install macOS Mojave onto your Mac or partitioned hard drive.
Do you have any questions about how to create a bootable installer drive for macOS Mojave? Let us know in the comments.
Updated September 2019: Updated for macOS Catalina.
macOS Catalina
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