On your Mac, click the Trash icon in the Dock. In the window that appears, do one of the following: Empty one item from the Trash: Control-click the item you want to delete, then choose Delete Immediately. In the warning message that appears, click Delete. Empty all of the Trash: Click the Empty button in the upper-right corner of the Finder. The new Mac operating system offers more than a name change. MacOS Sierra version 10.12 moves Apple's desktop OS closer to its mobile counterpart, gaining Siri, Apple Pay, and more.
Along with the upgrade of Mac OS X, its name has also changed to High Sierra. Due to Apple’s restrictions, some older Macs cannot be upgraded to the latest macOS High Sierra. You may want to install a completely new macOS. This article explains how to clean install the macOS High Sierra. First we need to do some preparation before we can install the new operating system.
In the first step, I will explain how to create a bootable USB flash drive that can be used to install Mac OS X. After making this USB, you will be able to easily install Mac OS X from a USB drive.
How to make a bootable USB
There are two methods to create a bootable USB drive:
1. Using a Terminal
I prefer the method of using a Terminal Command Line first. The advantage is that there is no compromise between compatibility and security, and it is easy for a novice to perform.
1. First, get a USB flash drive with a capacity of 8GB or larger. (Back up the old data in this USB flash drive, because the drive will be formatted during this process).
2. Download the official macOS High Sierra installation package. It is recommended to download it from the App Store. Put the keyword “High Sierra” directly into the search bar in the App Store.
The whole installation package size is about 5GB, so it might take a while to download. It will appear in the “Application” folder as shown below.
3. Open “Applications → Utilities → Disk Utility” and then “Erase” (format) the USB flash drive into “Mac OS X Extended(Journaled)” format. Rename the USB flash drive to “Sierra.”
(Note: the drive name should be the same within the corresponding command, if you change the drive letter name, you must make sure that the name within the command is the same.)
4. Open “Applications → Utilities → Terminal”, copy and paste the following command into the Terminal.app:
sudo /Applications/Install macOS High Sierra.app/Contents/Resources/createinstallmedia –volume /Volumes/Sierra –applicationpath /Applications/Install macOS High Sierra.app –nointeraction
Press Enter on your keyboard to execute the command, then you will be prompted to enter the administrator password, it will start the process after the operation:
5. As shown above, the process has begun. Wait for “Done” to appear on the screen which means you have made it successfully! (The entire time depends on the read and write speed of your USB drive.)
2. Using DiskMaker X
If you don’t want to use the Terminal Command Line method, there is another way using DiskMaker X.
Diskmaker X is a free macOS USB bootable disk creation application. You will need to first download the macOS High Sierra installation package. DiskMaker X will help you find its path automatically. Click on “Use this copy.”
DiskMaker X will then prompt you for a USB flash drive with a capacity of at least 8GB. After inserting the USB flash drive into the Mac, click “An 8 GB USB thumb drive.”
Next, you must choose which disk you want to erase. Choose the USB drive with the name you created in previous steps. Be careful not to choose the wrong drive!!
Choose “Erase then create the disk”, it will show the process on the notifications bar. Well done! You have now created a bootable USB drive.
How to Clean Install from a bootable USB
Now that you have a bootable USB drive, you will still be able to force install macOS High Sierra from the bootable USB drive, no matter how old your Mac is.
We have now completed all the most complex steps. Now let’s try the easy steps below to install a completely clean macOS:
1. Backup important personal data from your Mac. Online backup is very popular these days, as it offers an inexpensive way to secure your data. However, the fastest way to retrieve your backup is to use local backup. When you finish the clean installation of High Sierra, you can restore all your data from the local backup.
Note: A clean install of macOS Sierra on the startup drive completely erases all data on that drive including all your files (documents, music, movies, pictures, and even apps). So, If you skip this step, you won’t be able to recover your data if something goes wrong.
When choosing what to backup manually, most importantly look at the Users folder, located by default at Macintosh HD/Users/. This will back up your user account, along with any other accounts on the Mac, plus any shared data. Each user account contains your Desktop files, documents, downloads, videos, music, and pictures. If you have more than one user on your Mac, and you’re only interested in backing up your own data, just go one level deeper and select your user account from within the Users folder.
There is an easy way to backup each user account on your Mac. First of all, create a new admin account and login with this account. Access System Preferences→Users & Groups, and Clock minus button on the bottom in the left panel. Select Save the home folder in a disk image and Click Delete User. When it is done, backup the disk image to your online/local backup.
1. Insert the USB drive into your Mac and wait for it to be recognized by your Mac. Now shut down your Mac.
2. Press the power button to boot, hold down the Option key or Cmd+R until the boot menu option appears. Make sure to keep it pressed!
3. Choose the bootable USB drive and then Press Enter.
4. Select Disk Utility in the window.
5. In the next window, select the drive where you want to install High Sierra. In most cases the name should be “Macintosh HD.”
6. In the Erase Tab, click Erase with Mac OS X Extended (Journaled) type. When it is done, you get a clean drive.
7. Quit Disk Utility, Access to Install MacOS item. Follow the instruction showing in the next window, you can get a clean High Sierra.
8. Log in to the clean High Sierra. Insert/connect your online/local backup and copy each folder on the disk image generated in Step 1. Create the same old account names in System Preference → Users & Groups. Restart your Mac and login with the old account name, then you will get a clean system with all the old user data.
How to always keep your Mac clean
If you have done all installation of macOS, you must be enjoying the completely new macOS now. I believe you also want to keep your Mac clean. Let’s say someday your Mac has a lot of Junk Files and Duplicate Photos. And there are also many apps you have ever used but you don’t need them anymore. I must tell you there is a savior on your Mac! Its name is Cleaner One Pro. It’s really great to have such a system optimizer. Titanic an adventure out of time download mac. In its “Junk Files” feature, it can not only clean temporary files, including logs, mail caches, iTunes and iOS temporary files, etc. Empty Trash for current user but also detect remaining files after deleting apps.
It also has a function named “Duplicate Files”, which can find duplicate files on your Mac through fast and accurate scanning technique covers your entire home folder. Duplicates are selected not only by the file name but also by their contents. Files are shown in detailed previews. It can also help you decide which copy to delete by presenting “Auto Select” button.
Duplicates can be sorted by file type and listed in their full route for you to track. You can decide which way to clean these files; either by sending them to trash or deleting them permanently.
However, you must need an intelligent app uninstaller. Don’t worry, Cleaner One Pro has this function. It can auto-clean leftovers of deleted apps and manage all the applications installed on your Mac easily. When you remove an app you don’t need anymore, it can get rid of all the associated files of uninstalled applications as well. Alert you about new updates to installed apps is also its duty.
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Normally when you install a new version of macOS, you just install it over the previous version. It’s quick, easy and means we can be back up and running in no time, with all your apps and data ready to use. Your data remains but your software and file junk remains as well.
That’s why, sometimes, it makes more sense to run a clean install. Whether it’s because your Mac has accumulated so many junk files that it’s performance is badly affected or because you’re passing your Mac onto someone else and want to make sure all your data is removed. Or maybe you just want that fresh out of the box Mac experience again. Whatever your reasons, here is how to clean install macOS High Sierra.
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How to prepare your Mac for the clean install
Before you do anything, check that your Mac is able to run Apple's new operating system.
To complete the clean install procedure described below, you'll need:
macOS High Sierra Installer,available from the Mac App Store.
a 16GB or larger USB flash drive Notice: USB drive is needed for a clean install on your Mac’s startup drive. If you plan to clean install macOS on a non-startup drive, you don't need it.
go for a system cleanup and backup your data - this will allow you to easily return your Mac to the condition it was in before you installed macOS.
and an hour or two to spare.
Choose the right way to clean install macOS High Sierra
Before you proceed, you need to make a choice how to run a clean install. If you only have one drive and it’s not partitioned and this is where you have all your files and your OS, your choice is to clean install on the startup drive. This way entails one important fact: all your files and data will be deleted during the process.
If you have another drive or volume other than your startup drive, use the second way which is clean installing on a non-startup drive. It’s a more lenient and less intrusive way because your Mac doesn’t get wiped clean, only your system.
If you don’t know which one you have, go with the first option, startup drive.
How to clean install macOS on a startup drive
Once you have everything that's needed, let's begin. Don’t worry, this step-by-step guide will walk you through all you need to do.
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The process of performing a clean install involves wiping your Mac’s main drive clean so it’s essential that you back it up immediately before you start. You might not want to backup the files you don’t need and system junk, so make sure to clean that up beforehand. An easy way to go about this is to get a Mac cleaning app like CleanMyMac. It will save to hours of manual file cleanup and polish your system before the backup.
Start with a system cleanup
Delete everything you don't need - large and old files and archives, useless apps, cache data and other junk, duplicate files - all these files silently eat up the disk space, duplicate images are especially hard to find out.
You can always use CleanMyMac to cleanup macOS system junk, large and old files, and remove unwanted apps. You could do it manually, but CleanMyMac only all it takes is a few clicks.
Then you can use Gemini to easily find duplicate files and folders on your hard drive, so you can delete them and save precious storage space.
Backup your data
Now, for the backup itself use Get Backup Pro. It’s more powerful than Apple’s own Time Machine. It’s also a good idea to create a bootable clone, so if anything goes wrong you can go back to where you started easily. Also, a cloned drive makes copying files back to your newly-updated system very easy. And move your images and documents into the cloud or to an external drive, just to be on the safe side.
As well as backing up your Mac, you should also take screenshots of settings in any apps you’ve customized so that you can set them up again quickly later. And make sure you have a record of license codes for apps and passwords for websites.
Clean install macOS, securely
Your Mac deserves a fresh start. Get the right tools for clean installing Apple's operating system.
Create a bootable macOS installer
Download macOS High Sierra from the App Store. Here is a link to find it on apple.com.
When it’s finished, the installer will launch. As soon as it does, select File and Quit (or keyboard shortcut Command-Q) so it doesn’t install. The installer will remain in your Applications folder.
Plug in the USB stick and launch Disk Utilities. It’s a good idea to use a USB stick to put the bootable installer onto. It will need to be at least 8GB in size.
Click the Erase tab and make sure Mac OS Extended (Journaled) is selected in the format tab.
Give the USB stick a name, then click Erase.
When it’s finished, click Done and close Disk Utility.
Launch Terminal either by searching for it in Spotlight or navigating to the Utilities folder in Applications.
Type, or paste, the following command into Terminal, where [YOUR DRIVE NAME] is the name you gave the installer drive when you formatted it: sudo /Applications/Install macOS High Sierra.app/Contents/Resources/createinstallmedia --volume /Volumes/[YOUR DRIVE NAME] --applicationpath /Applications/Install macOS High Sierra.app Notice: Remember to replace [YOUR DRIVE NAME] with the name of your installer disk.
Hit Return.
Type in your admin password and wait.
When the process is finished, the word Done will appear in the Terminal window.
You can then quit Terminal
Install macOS on your startup disk drive
Make sure you backup your Mac to keep your important files, before taking next step, that erase your Mac’s Startup drive.
How to download gta5 on mac for free. To erase your Mac’s main drive:
Go to System Preferences
Сlick Startup disk and choose the installer you just created.
Restart your Mac and hold down Command-R to boot into recovery mode.
Take your bootable USB and connect it to your Mac.
When the macOS Utilities screen appears, follow these steps:
Apple Os Sierra Download
Select Reinstall a new copy of macOS.
Click Continue, then click Continue again when the next window appears.
Agree to the terms and conditions, then select your Mac’s internal drive.
Click Install.
Wait for macOS High Sierra to install and your Mac to restart.
When your Mac has restarted, you’ll need to follow the process of setting it up as if it was a brand new Mac. So, you’ll need to connect to your wifi router and type in the password. Then you’ll need to type in the details for your iCloud account. Then you’ll have to set up a new admin user account.
Once you’ve done that, you can start installing apps. In order to re-install Setapp apps, go to setapp.com to get Setapp installer or download Setapp here. You’ll need your username and password.
It’s a good idea to only download those apps you need to use straight away. Other apps can be downloaded as and when you need them. That way you avoid cluttering up your brand new macOS.
If you use a cloud service like Dropbox, now is the time to re-connect. And you can copy any documents, photos or other files you need from the backup you made at the start.
Find more information about Apple Mac update
Clean Install macOS High Sierra on a non-startup drive
You don’t need a backup for this option, it’s safer and faster than the previous way but only available to you if you have an extra drive or your drive is broken down into volumes.
Here’s how to instal your new macOS on the non-startup disk.
Download Mac Os High Sierra
Step 1. Erase your non-startup drive
Before you install the new OS on it, you need to erase all data on the drive you’ve chosen for it. To do it, use Disk Utility. Choose the volume you’d like to clean up and click Erase.
If you still need some info from that drive, you can use an app like ChronoSync Express to sync it with another drive and keep the files.
Step 2. Download the macOS High Sierra Installer from the Mac App Store
To download it, open the Mac App Store and go to the Updates tab (Here is a link.) When your installer is downloaded it will launch automatically but you need to quit it.
Download Mac Sierra Install
Fortunately, for this option you don’t need to create a specific bootable drive and you can simply use the installer from your startup drive and install the macOS onto the other one.
Step 3. Install macOS High Sierra to your non-startup drive
Launch the Installer from the Applications folder and press Continue. Change the target drive for installation. macOS will offer you startup drive by default so you need to click Show All Disks button and choose your non-startup disk volume. From then on simply follow the installation guide and after that you’ll have to set up your Mac as a new one. That entails creating a new user account, setting up date and time zone etc.
Now that you have the latest macOS, you can enjoy its superior features and top performance. Clean install (when performed on a startup drive) does remove your apps so if you don’t feel like looking for every app and their licenses again, get Setapp. More than 100 apps in one suite available by subscription. Saves you time and money on looking for apps for your daily tasks.
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