In this section, we're going to cover installing Mac OS, there's a few different times you may want
to install a reinstall Mac OS first, you may be upgrading your Mac to the latest OS using the App Store
or the software update system preference.
Second, you may need to reinstall Mac OS on your boot partition to recover from an issue in recovery
mode.
And third, you may want to install Mac OS on a USB hard disk that will allow you to create a bootable
recovery drive that you can use on multiple different Macs in this demo.
We're going to cover installing Mac OS on an external USB hard disk so you can create a bootable recovery
drive.
I like using this kind of drive to test new features of the operating system without running the risk
of messing up my production Mac OS install.
And it also gives me a tool that I can use to diagnose problems on other McIntoshes.
In addition, we're also going to step through the process of creating a bootable Mac, install a USB
drive using the terminal.
You may want a bootable USB disk if you need a solid, fresh install of multiple Macs from recovery
mode.
So I'm ready to go ahead and start installing Mac OS, so I'm going to go ahead and download it from
the App Store, the U.S. we're going to download Mahomet.
That's the latest one.
And.
Go ahead and get actually in the newer version of OS 10, it actually brings up a software update depending
on what version of OS 10 you're running, it may download directly through the the App Store interface
or it may prompt you through software update.
So we're going to go ahead and say download and this will take some time.
So as you can see, it's about a six gigabyte download.
So we'll let this finish and we'll come back in just a second.
All right.
We're back.
And it's almost done installing and downloading the update.
So when it starts up, you'll get the Mac OS might have a screen, as we have here.
And I'm just going to point out where this is sitting at, because it is important for later when you
go into your applications folder where it actually installs, it is right here.
Applications install MapQuest McGarvey.
So when a download from the App Store or through software update, that's where it places it and and
then launches it from there.
So we'll go ahead and step through the process.
I'm going to go ahead and install this on the Mac Boot drive that we formatted in an earlier lesson.
So just clicking through the terms and services, this would be very similar to what you would see if
you're installing it through recovery mode as well.
So it show me my internal hard drive.
I don't want to install it there.
So I'm going to go ahead and show all disks.
And there's my external Mac Boot drive, which we had prepared.
So I've got a Mac boot drive here is all formatted actually formatted for apps so that I can run McGarvey
on it in its best default mode.
Once I have selecta that I hit install, it'll tell me right now I'm on a battery.
Probably want to plug it into a power source for this to continue, but go ahead and hit next punch
in your password.
And it will begin the installation and it'll reboot a couple of times through the install and then walk
me through creating a local user accounts and naming the machine.
So it's basically set to go at this point and we'll let it finish doing its install.
The last thing I want to show in this lesson is how to create a beautiful Bakhos install USB drive.
There are going to be times when you're going to need to install OS 10 on a lot of computers and you
don't want to go through the process of downloading it from the App Store every single time.
And there's also going to be times when you may want to have a flash drive that you can quickly boot
up a machine and run any of the recovery tools on.
And so what I'm going to show you here in a minute is how to create a bootable USB drive that will not
only allow you to install OS 10, but also allow you to have access to recovery tools like this first
aid and disk utility from a bootable USB stick.
To create a bootable Mako's install USB disk, you really only need a couple of things.
First, you need a USB stick that has at least eight gigs of space, and the one I have here is a sixty
four gig stick.
So you want to put that in, you want to format it using disk utility.
It's going to format it again as part of the install process, but I always like to format it so it's
fresh and is recognized and I can see it on my desktop.
So you, you do that.
The other thing you have to have is a copy of the Mac OS install from the App Store.
We have a copy of the Mojave installer that we used earlier.
So I mentioned that you want to make note that it's in the applications folder.
So you've got both of those things and then we're going to use terminal.
So I'm going to go ahead and open up a new finder window here and I'll go to utilities.
And in the utilities, I've got terminal.
So I'm going to go ahead and open that up.
So I don't want you to be too worried about using the terminal if you're not familiar with it or you
haven't used it.
I know it can somewhat be somewhat intimidating, but this is really, really simple.
So we're going to use some of the drag and drop features that Apple has built in between the Mac user
interface and the terminal to kind of help us for those of you who aren't great with typing in Unix
commands.
So the first thing we're going to do is type in pseudo, which basically super user do that is going
to allow you to use run this as route and we're going to use an install, create, install media tool
and that's actually hidden inside the Mac OS installer.
So in Mac OS, many of these applications are actually packages.
So there's a lot of supporting files that are inside the file itself.
So if I.
Right.
Click on this, I can say show package contents.
So when I do that, it actually provides me with a whole list of different things here.
And there's a resource folder and inside here there's a create install media.
And you can see this is a Unix executable here.
So we need to execute this in the Unix terminal so we could type the path to the applications folder,
to the installer, to the resources folder and actually to the executable.
But we can do this a little easier by just dragging and dropping so I can actually drag and drop, create,
install media and you'll see it automatically writes the path for me, which is really great because
there's some spaces in here and things like that.
And then we're going to do we got to specify a volume.
So we'll do that.
And then the same thing, the volume, which is going to be our target for our USB drive, we're going
to drag and drop the USB drive in here as well.
And it does the same thing.
So once it's done that, I'll just hit enter.
It's going to ask me for my local passwords, my local administrative password to enable the route user.
And you'll see it's ready to start and asks if we want to go ahead and erase the volume, which we do.
Yes.
And now it's going to go ahead and raise that disk.
You'll see it dismounted, mounted it and it's mounted it again.
Now it's formatted and named properly and now it's starting to copy the install media to that removable
disk.
So we'll start we'll stop there and we'll come back here in just a few minutes after it's finished.
All right, it's finished having the files and made it bootable, and now it's all done and you can
see install media is now available at volume slash install OS Mahaba and we're back to our command prompt.
This point, I can just exit the close out of the terminal and you can see on my desktop here I have
my own Harvey installer.
You can see it's got this on here and we can also double check and make sure it's bootable by going
to system preferences.
And start up this and you'll see right here that we have installed MapQuest, Mahaba is one of our bootable
options.
So.
That's how you create a bootable USB disk.
And you can put this in IndyMac and hold down the option key and choose to boot off of it and be able
to perform a recovery using recovery tools, manage the disk or install a fresh copy of OS.