Apple makes installing macOS very simple — if you only have one Mac. When you have many, it takes an unnecessarily protracted time. Circumvent Apple's installer and create your own using the Terminal.
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We shouldn't complain. To install macOS Mojave on your Mac, you just download it and let Apple's installer do its job. Only, that installer is big — circa 6GB — so downloading it can take a time. And once it's run, Apple immediately deletes it. To install Mojave on a second or third or fourth Mac, you're supposed to re-download it to each one.
Given that we have lives as well as multiple Macs, we need to do something about this. Rather than working through Apple's installer, you download that once and stop it before it begins working. Then type some commands in Terminal to extract Mojave, and put the installer on an external drive so you can re-use it without having to download it every time..
This is one of the easiest uses of the Terminal program on Macs — but it still needs you to take care — and in this case to specifically copy and paste the instructions into it. A stray typo isn't likely to cause you problems, it's more likely to just not work, but it can.
- Jul 02, 2020 How to erase your disk. Start up from macOS Recovery. Then select Disk Utility from the Utilities window and click Continue. If you're not erasing the disk your Mac. Choose View Show All Devices from the menu bar in Disk Utility. The sidebar now shows your disks (devices) and any containers.
- Oct 07, 2019 If you have previously partitioned your Mac's hard drive in order to download a macOS beta or install Windows, but now you need that storage space back, you can remove the partition and recapture the much-needed space.Here's how. Getting rid of a secondary partition on the Mac.
- Many Mac users send us emails and ask how to format external hard drive, USB flash drive on Mac after they install macOS Mojave in the Mac. If you are also looking for a solution to format external hard drive/USB flash drive in macOS 10.14 Mojave, you just come to the right place.
- Jan 17, 2019 How to force a Hard Drive to unmount for formatting in Mac OS X Disk Utility - Duration: 6:11. Gemsbok Apple Tips and Tricks 284,963 views.
- Solution 1: format external hard drive/USB flash drive in macOS Mojave with Disk Utility Disk Utility is a traditional Mac disk tool. It can help you format external hard drive/USB flash drive after you upgrade your Mac OS to macOS 10.14 Mojave. Just run this app from Launchpad and use it to erase the external hard drive/USB flash drive.
Disk Utility showing GUID option for drive format Click Erase to wipe all the data that’s currently on the drive and reformat it for your macOS install. The drive will be formatted HFS+, but.
Then, too, this is ultimately about installing a major macOS update onto all your Macs so that thought you had a moment ago about backups is spot on. Make a backup. Make two.
Get Apple's macOS Mojave installer and start downloading it. Most of us will get it from the Mac App Store but if you have a developer account, you can elect to get the latest beta from developer.apple.com instead.
While that download is happening, pick a drive — USB or Thunderbolt-connected — that you can use as a Mojave install disk. It will end up erased and with only the Mojave installer on it so really pick one you can spare.
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If that's an SSD one then you'll be glad: the speed of the installation depends hugely on how fast your drive is.
Mount the drive or the volume that you want to do this on. That drive can be called anything you like but so that you can just copy and paste our Terminal instructions, rename it macinstall. You can rename it again later.
When Apple's macOS Mojave installation app is downloaded, launch it but don't let it start the installation process. Click on the Install macOS Mojave menu and choose Quit Install macOS.
Make a copy of Apple's installer. It'll be in your Applications folder with the name Install macOS Mojave. Copy it to another folder or drive just so that you know you never have to schlep through this downloading again — at least until next year.
With Apple's installer safely copied somewhere and the drive you want to make into a bootable installer ready and mounted, now you open Terminal.
It's in Applications, Utilities. It opens to a command line: copy and paste the following into it:
sudo /Applications/Install macOS Mojave.app/Contents/Resources/createinstallmedia — volume /Volumes/macinstall
Hit return and you'll be asked for your Mac admin password. When you enter that, Terminal starts running a program called createinstallmedia. It's an Apple program: they've created it for us all, they just haven't mentioned it much.
Terminal and createinstallmedia will remind you that this means erasing the drive and if you enter Y then it will start the process. First it erases the drive and you'll see it report '10% 20%' as it goes.
Then when that's done, it automatically copies the installer files — the Install macOS Mojave downloader from Apple — onto the drive. Lastly it makes that drive bootable.
Depending on the speed and age of both your Mac and your hard drives — both the spare and the one you're currently booted from — this could take anywhere up to 20 minutes.
After that, type exit into Terminal and when it says Process Completed then choose File, Quit.
Now you have a drive called macinstall. It's bootable and it contains only the macOS Mojave installer. That means you can eject that drive and take it to any or all Macs you've got. Plug it into each one in turn, reboot the Mac from it and run the Mojave installer.
The process will still take some time — but an external installer will save you the substantially long and tedious time it would take downloading the installer for macOS onto each Mac from Apple's servers.
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Check compatibility
You can upgrade to macOS Mojave from OS X Mountain Lion or later on any of the following Mac models. Your Mac also needs at least 2GB of memory and 12.5GB of available storage space, or up to 18.5GB of storage space when upgrading from OS X Yosemite or earlier.
MacBook introduced in 2015 or later
MacBook Air introduced in 2012 or later
MacBook Pro introduced in 2012 or later
Mac mini introduced in 2012 or later
iMac introduced in 2012 or later
iMac Pro (all models)
Mac Pro introduced in 2013, plus mid-2010 or mid-2012 models with a recommended Metal-capable graphics card.
MacBook Air introduced in 2012 or later
MacBook Pro introduced in 2012 or later
Mac mini introduced in 2012 or later
iMac introduced in 2012 or later
iMac Pro (all models)
Mac Pro introduced in 2013, plus mid-2010 or mid-2012 models with a recommended Metal-capable graphics card.
To find your Mac model, memory, storage space, and macOS version, choose About This Mac from the Apple menu . If your Mac isn't compatible with macOS Mojave, the installer will let you know.
Make a backup
![Mojave Mojave](/uploads/1/2/6/8/126871886/584794638.jpg)
Before installing any upgrade, it’s a good idea to back up your Mac. Time Machine makes it simple, and other backup methods are also available. Learn how to back up your Mac.
Get connected
It takes time to download and install macOS, so make sure that you have a reliable Internet connection. If you're using a Mac notebook computer, plug it into AC power.
Download macOS Mojave
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For the strongest security and latest features, find out whether you can upgrade to macOS Catalina, the latest version of the Mac operating system.
If you still need macOS Mojave, use this App Store link: Get macOS Mojave.
Begin installation
After downloading, the installer opens automatically.
Click Continue and follow the onscreen instructions. You might find it easiest to begin installation in the evening so that it can complete overnight, if needed.
If the installer asks for permission to install a helper tool, enter the administrator name and password that you use to log in to your Mac, then click Add Helper.
Allow installation to complete
Please allow installation to complete without putting your Mac to sleep or closing its lid. Your Mac might restart, show a progress bar, or show a blank screen several times as it installs both macOS and related updates to your Mac firmware.
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Learn more
Mojave For Mac Download
- If you have hardware or software that isn't compatible with Mojave, you might be able to install an earlier macOS, such as High Sierra, Sierra, or El Capitan.
- macOS Mojave won't install on top of a later version of macOS, but you can erase your disk first or install on another disk.
- You can use macOS Recovery to reinstall macOS.