Finally, retry the macOS Sierra install. Use a different USB port on the Mac. Use another brand of USB flash drive. Delete and re-download the macOS Sierra installer (especially if you downloaded it a long while ago). The simplest way to create a boot USB drive is to download DiskMaker X and use it to create your drive. Generally, the latest version supports only the latest version of macOS; if you want to install something older than macOS High Sierra, check the list of older versions and download one that’s compatible with your chosen operating system. This article is focused more on the process part of downloading macOS High Sierra 10 on ISO River platform. With the article, the users can easily understand the bootable USB process to install macOS High Sierra 10.13 full installer. Moreover, this is encouraging a new introduction and an updated side of the macOS software.
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To create a MacOS High Sierra bootable USB drive, you would need to follow some steps:
First all you are needed to fulfill some needs.
- You need a USB that has a storage of at least 16 GB as this space will be used to store the bootable MacOS High Sierra installer.
- The MacOS High Sierra installer is a file that has a size of more than 5GB. So, you are required to have a good and stable internet connection in order to download this file quickly.
- You need to have an external hard drive in which you can keep a backup of all the data that is currently stored on your Mac. This hard drive should be of the same size as of your Mac’s hard drive.
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Create a backup
Once you have fulfilled all the requirements, you would need to start the process by backing up your data.
Before backing up the data, it is recommended that you use a cleaning application that would clean your Mac because overtime lots of junk files would stack up in your Mac and once you install the new Mac OS, it would not perform to its full capacity because of the existence of such files.
You can manually delete these files, but it would take you lots of time to locate these files. It is recommended for you to use a cleaning application like cleanmymac x.
Cleanmymac x is a popular cleaning application that would remove blocks of junk data from your Mac in just a few clicks.
- The first step to carry out is to install cleanmymac x application.
- Once the application has been installed, open it.
- When the application has been launched, you will be greeted with a welcome page.
- At the bottom of this page, you will see a scan button.
- Press this scan button. Now cleanmymac x would begin to Search and delete all of your junk files. After this it will run a protection scan to Search and remove all the malware from your Mac. At last, a speed test would run, which will state how much the performance of your Mac has improved after removal of the junk files.
- Through this simple way, you can remove large junk files from your Mac.
Cleanmymac x won’t be able to find duplicate folders on your Mac, due to which you would need to use another application.
Gemini is an application that would remove all the duplicate files and folders from your Mac.
- Firstly, install the Gemini application.
- When this application has been installed, open it.
- Once the application has launched, press on the smart cleanup option.
- Now Gemini will find and remove all the duplicate files and folders that cease to exist in your Mac.
- Gemini also allows you to see how many duplicate files and folders exist on your Mac by pressing on the review results option.
Once you have cleaned your Mac, begin the backup process.
- Plug in the external hard drive into your Mac.
- Now go to system preferences and in here open the Time machine application.
- In the left side of time machine, there will be a switch, which will be turned off. Click on this switch and turn it on.
- In the time machine application, an option labeled “select backup disk” can be seen. Click on it and choose the external hard drive as the backup disk.
- A message will open, which will state that whether you want to choose this drive as your backup disk. Select the yes option.
- You need to make sure that the external hard drive is completely empty because the time machine application would reformat it.
- Once the drive has been reformatted, time machine will start to back up your data.
- Once the backup has been completed, open up the Mac app store.
- Here Search for High Sierra in the search bar and download this application.
- Once the application has been installed, it can be seen by the name of MacOS high sierra in the applications folder. It should be noted that this application opens up automatically once it is installed, so make sure to close it.
- Now click on the link given: Download
- This link will install the High sierra installer in your Mac.
- Once the installer has been downloaded, plug in the USB in your Mac.
- In this USB, place the high sierra installer file.
- You should empty up the USB drive because MacOS will reformat it.
- Once the USB drive has been reformatted, change the name of the USB to “High sierra”.
Install the High Sierra installer with Terminal
- Once the high sierra installer file has been placed in the USB, open up the terminal application in order to create a boot disk.
- If you have unplugged the USB in which the High Sierra installer is placed, plug it back into your Mac.
- Once the terminal application has been opened, enter the following commands in its console: sudo /Applications/Install macOS High Sierra.app/Contents/Resources/createinstallmedia –volume /Volumes/HighSierra
- Once you have entered this command, you will be asked to enter your username and password.
- After you have entered these details, a warning message will appear stating that all the contents of this drive will be deleted. Enter Y to confirm this statement.
- Now the terminal would delete the contents of your USB.
- You will now be asked that if you want to the bootable High Sierra USB drive for your backups. Choose the “Don’t use “option and terminal will copy the installer to the drive in which High sierra is saved.
- When the installation process has been completed, close the terminal application.
Installation of MacOS.
- Once the bootable High sierra installer has been created, you will be required to install MacOS.
- Before starting the process of Installing MacOS, you should create a Backup of all the files stored on your Mac, as in this installation process, all the contents on your Main drive will be deleted.
- To begin the installation process, you would need to open up system preferences.
- In here, look for startup disk and once it is found, open it.
- In startup disk, you will be required to choose an installer. Choose the High sierra installer file.
- Now you would need to restart your Mac.
- As soon as your Mac turns back on, press the command and R key. This will load your Mac in recovery mode.
- Now plug in the USB in which the High sierra installer file has been stored.
- After some seconds, a MacOS utility screen will open. In here you need to press on ‘ Reinstall a new copy of MacOS’s and hit the continue button.
- Now a terms and conditions page will be opened before you. Read these and then press Agree.
- Now you will need to choose your Mac’s main drive. Click on it and press install.
- Now the installation process of the MacOS High Sierra will begin and after some time a New MacOS will be installed in your Mac.
An alternative method for installation MacOS high sierra
This method will be much safer than the above method, but you will be required to divide your Mac’s main drive into several partitions or you would need to have an external hard drive.
Another benefit of installing High Sierra MacOS through this method is that none of your data will be erased from your Main drive because the high sierra MacOS will be installed in the external hard drive.
You need to follow a simple procedure in order to attain MacOS high sierra via this method:
- Open up disk utility on your Mac.
- Here, select the external drive as the disk on which you want to install the MacOS High sierra.
- Once you have chosen this file, a window will pop up.
- In this window, press on the erase option.
- Now go to the Mac app store and install high sierra from here.
- Once this application has been installed, download its installer from this link: Download
- When the installer has been downloaded, open it.
- In the installer, look for a tab labelled “show all disks”. When you find this tab, click on it.
- Now choose the external drive as the destination for storing this installer.
- The last step is to follow all the instructions in the installation guide of the installer so that you can install MacOS High sierra on your Mac.
To perform a clean installation of macOS Sierra (basically, Mac OS X 10.12), I recommend using a bootable USB flash drive containing the macOS Sierra installer. Below are the steps I took to create the bootable USB flash drive and how I used it to install macOS Sierra.
Note: The macOS Sierra Disk Utility and installer appears to be more buggy and much slower than previous versions. The best advice for installing macOS Sierra is to try again and be very patient (if you expect an operation to complete in 5 minutes, then give it at least 50 minutes).
Download macOS Sierra Installer
The macOS Sierra installer is available from the Mac App Store. Run the “App Store” application, search for “macOS Sierra”, and download it. It will save the installer as an “/Applications/Install macOS Sierra.app” file (about 4.97GB in size).
Note: If you run the macOS Sierra installer to upgrade your Mac, the downloaded file will be deleted automatically after the upgrade is completed. To keep that file, you will want to move it out of the Applications folder so it won’t be deleted after an upgrade. Launch the “Terminal” application and run this command to move the downloaded installer to your user’s “Downloads” folder:
If you are paranoid (doesn’t hurt), you can verify that the installer file was downloaded correctly by verify its checksum. Run the “Terminal” application and this command:
# If successful, the last output line should read:
# hdiutil: verify: checksum of '/Applications/Install macOS Sierra.app/Contents/SharedSupport/InstallESD.dmg' is VALID
Format USB Flash Drive
The macOS Sierra installer takes up 5.1GB of space on the USB flash drive, so you will need a flash drive with a capacity of 8GB or greater.
Note: If the flash drive is mounted under “/Volumes” successfully when you plug it in, you can skip the following steps to reformat the flash drive. This is because the script we run to create the bootable drive will reformat the flash drive as an initial step. Because I am paranoid, I recommend reformatting the USB flash drive manually anyhow.
Format the USB flash drive using these steps:
- Plug the USB flash drive into your Mac.
- Launch the “Disk Utility” application.
- On the left-hand pane, select the USB drive (not the partition under it, if any).
- Click on the “Erase” tab (or button at the top).
- Input a name like “Sierra” (this name will be overwritten later).
- Select “Mac OS Extended (Journaled)” for “Format”.
- Select “Master Boot Record” for “Scheme”.
- Click the “Erase…” button at the bottom. Click the “Erase” button in the warning popup dialog if you get one.
- The format operation may take several minutes to complete. (USB 2.0 and large capacity drives will take longer.) After the format completes, the partition will be mounted under “/Volumes/Sierra” (or whatever name you selected above).
- Note: Under macOS Sierra, the Erase function will fail if the USB drive’s partition is mounted. You can manually unmount the partition before running Erase. Or you can run Erase twice; the first time will unmount the partition and fail, and the second time will actually do the format (which will succeed).
- Close the “Disk Utility” application.
Create Bootable USB Flash Drive Installer
To create the bootable USB macOS Sierra installer, run the “Terminal” application and this command:
sudo/Applications/Install macOS Sierra.app/Contents/Resources/createinstallmedia --volume/Volumes/Sierra --applicationpath/Applications/Install macOS Sierra.app --nointeraction
# You will be prompted for your user's administrative password.
Update: For macOS 10.14 Mojave (and its predecessor, macOS 10.13 High Sierra), the createinstallmedia command no longer requires the “–applicationpath” and “–nointeraction” flags, so omit them. The command becomes just “createinstallmedia –volume /Volumes/Mojave”.
Note: If the createinstallmedia command returns a “Failed to start erase of disk due to error (-9999, 0)” error, then your current Mac OS X version does not fully support the createinstallmedia tool. Instead, create the USB installation drive manually using instructions from Bootable USB Flash Drive to Install Mac OS X 10.10 Yosemite.
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The “createinstallmedia” program will erase the USB flash drive, create a new partition named “Install macOS Sierra”, and copy the installation files to that partition. The output will look like:
Copying installer files to disk...
Making disk bootable...
Copying boot files...
The program will pause at the “Copying installer files to disk…” output line above. This step took 20-30 minutes with my Kingston 16GB USB 2.0 flash drive. Yours may take a shorter or longer time. I recommend giving it at least an hour, maybe two, before giving up.
Note: Mac hardware is very finicky about USB flash drives. Initially, I used a Corsair 32GB USB 3.0 drive; however, when I held down the Option key to try to boot with it, the Mac would freeze with a black startup screen. The Kingston 16GB USB 2.0 drive did not have this problem. So if you enounter issues (when erasing and copying) or weirdness (when booting), consider changing to another brand of USB flash drive. If you don’t have another drive, consider at least testing the flash drive to make sure it is not bad or corrupted (“First Aid” in “Disk Utility” is the minimum; google for more powerful tools).
Boot With USB Flash Drive
Note: I recommending connecting the Mac to its AC power adapter before beginning the macOS Sierra installation. The installation may take a long time (an hour or more) and you don’t want the battery to die in the middle.
To boot a Mac with the USB flash drive:
- Shutdown the Mac.
- Insert the USB flash drive.
- While holding the “option/alt” key down, turn on the Mac to display the boot Startup Manager.
- You should see one or more icons, one of which should be called “Install macOS Sierra” for the USB flash drive. (The internal hard drive may not be visible if it does not have a valid, bootable partition installed.)
- Note: If you don’t see the USB flash drive’s “Install macOS Sierra”, try removing and re-inserting the USB flash drive while viewing the Startup Manager screen. The USB flash drive should then appear after a few seconds.
- Select the “Install macOS Sierra” (with left/right arrow keys) and hit the “return/enter” key to boot from the USB flash drive.
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It may take 5-10 minutes or longer to load the installer from the USB flash drive. Sometimes the progress bar may appear to be frozen… just be patient. I would give it at least 30-60 minutes to load before giving up.
Format the Hard Drive
When the installer finishes loading, you will see a “macOS Utilities” window appear. Do the following to format the internal hard drive:
- Click on the “Disk Utility” option and click the “Continue” button on the bottom to launch the “Disk Utility” application.
- On the left-hand pane, select the hard drive (not the partition under it, if any).
- Click on the “Erase” button at the top.
- Input a name like “macOS”.
- Select “Mac OS Extended (Journaled)” for “Format”.
- Select “GUID Partition Map” for “Scheme”.
- Click the “Erase…” button at the bottom.
- For SSD (Solid State Drive), the format operation may take less than a minute to complete. For mechanical hard drive, it may several minutes to hours, depending upon the size, speed, and condition of your hard drive.
- Note: Again, the Erase function will fail if the hard drive’s partition is mounted. You can manually unmount the partition before running Erase. Or you can run Erase twice; the first time will unmount the partition and fail, and the second time will actually do the format (which will succeed).
- Close the “Disk Utility” application.
Note: Now and then, I noticed the output of the Erase seems to erroneously double the size of the hard drive. For a 128GB hard drive, the graph shows 120.88GB macOS (in blue) and 120.37 GB Unformatted (in red). I think it is just a user interface bug because when I close Disk Utility and re-open it, the graph then only shows the 120.88GB macOS (in blue).
Install macOS Sierra
Back at the “macOS Utilities” window, do the following to begin the macOS Sierra installation process:
- Click on the “Install macOS” option and click the “Continue” button.
- The “macOS Sierra” installer’s splash screen will appear. Click the “Continue” button.
- Click on the “Agree” button to agree to the license. A popup confirmation window will appear; click on the popup’s “Agree” button.
- Select the hard drive and click the “Install” button.
Note: You may encounter strange hardware behavior. On my 13 inch Macbook Pro Retina, the macOS Sierra installer turned the fan on to maximum for the whole duration of the installation. Thankfully, once it finished and rebooted, the fan turned off and stayed off.
The macOS Sierra installer tries to be helpful by telling you how long it will take. Unfortunately, it lies. You should take whatever remaining time it tells you and multiple by 10 (for minutes) or 100 (for seconds). If it says “6 minutes remaining”, that could mean 60 minutes or one hour remaining. Worse, if it says “6 seconds remaining”, you may be staring at that message for 600 seconds or one hour.
The best solution is to be patient. Go grab a bite to eat and watch a movie. Take a long nap or better yet, sleep your 8 hours. I would wait at least 4 hours before giving up.
Note: You can display the installer’s log window (using the menu or pressing Cmd+L). I didn’t find this helpful at all. Even for a successful install, numerous errors are logged; I don’t know what is a critical or non-critical error. And often, you won’t see a progress/status log output for a long time, easily 20-30 minutes. Not seeing any new log statements does not mean that the installer froze. So the logs didn’t do anything for me.
What Does Giving Up Mean?
Giving up means you have accepted defeat. The next step is to retreat and try again. Some suggestions on how to proceed:
- Reset your Mac by doing the following:
- Reset the SMC (see step 3 under the “Reset the SMC on Mac notebook computers” section).
- Reset the NVRAM (aka PRAM).
- Run the Apple Hardware Diagnostic or Test to make sure you don’t have a hardware failure.
- Finally, retry the macOS Sierra install.
- Use a different USB port on the Mac.
- Use another brand of USB flash drive.
- Delete and re-download the macOS Sierra installer (especially if you downloaded it a long while ago). Even if the checksum is okay, you may want to re-download in case there is a newer version of the installer with a bug fix for your very problem.
- Download an older Mac OS X version, say Mac OS X 10.11 El Capitan, install that, and then upgrade to macOS Sierra. If you know the Mac OS X version which came with your Mac originally, consider downloading (if you still have access) and installing that version first.
- Use the Mac Recovery System to download and install the original OS version that came with your Mac. Then upgrade from that to macOS Sierra.
- Buy a more recent model Mac (at most a couple of years old). It may be that your current Mac is too old or slow to support macOS Sierra. It’s okay to keep running an old Mac OS version. (For example, if I had a Core 2 Duo Mac, I would not run anything later than Mac OS X 10.9 Mavericks on it.)
Hopefully, this post will help you to do a fresh installation of macOS Sierra.
Some info above taken from: