Source: iMore
Jan 06, 2016 Follow the instructions to reinstall Mac OS X. Step 1: Clone your hard drive The process of resetting a MacBook to factory settings gets rid of all your data from the Mac. Obviously you should transfer data from your old Mac to a new one, but it’s worth making a clone of the whole hard drive and keeping it around for a while. Once you have downloaded the OS create a bootable USB key. DiskmakerX will make one for you, there is also a terminal command that you can use to do the same thing. If you boot from installable media and then wipe the drive before proceeding with the installation that problem with an AppleID will go away and you will be free to register the OS. Because restoring your Mac replaces the contents of your computer with a default version of OS X, your existing files, preferences, settings and third-party software will be deleted. Restore DVD Macs come with all default software already installed on the computer, so you can take it out of the box, press the 'Power' button and start playing. Oct 09, 2016 Reinstalling Mac OS can be one of the easiest ways to fix problems on your Mac. You can also restore your computer to its original factory setting. Filed Under: How to Tagged With. Will be verified. It’s clear, plain English that ANY Apple software engineer would understand! Oh, your NOT an Apple software engineer? That’s just too.
It is that time again. Time to decide whether to keep or replace your Mac laptop or desktop computer. If you are reading this article, chances are you've already come to the decision to replace your Mac with the newes model (or maybe you just got a new Mac as a present!), and you're thinking about selling your old one.
The first thing you should do before hitting the streets to sell your old Mac is clear it of any and all personal data. You don't want to accidentally sell your computer to a stranger when you are still logged into iCloud.
The next step is to reinstall the Mac's operating system so that the new owner can get started without having to figure out how to start up in recovering mode. Believe me, that can be a pain.
If you're going through the process of erasing your old Mac and reinstalling the operating system, we've got some common troubleshooting tips to help you out. Don't forget to follow the additional steps if you're selling a MacBook with Touch ID.
Clean the Mac of your personal data before erasing it
If you're about to sell your old Mac, the one thing you don't want to do is to give away the data you've been storing on it all these years. It's a security and privacy thing for you, but it's also important for the buyer. If you leave behind anything that needs to be logged into with a password, that buyer is going to have to track you down and get your password in order to change ownership. A completely fresh-from-scratch Mac is the best way to do this.
Step 1: Back up your Mac
If you already have your new Mac on hand, you can transfer all of your data from your old Mac or use an older Time Machine backup. If you don't have your new Mac yet, well .. then you probably shouldn't be selling your old one yet. But, if you really don't think you'll need your old computer before getting your new one, just make sure to back up your data so that nothing happens to it before you get what you need onto your new Mac.
Step 2: Sign out of everything
The software you have on your Mac is licensed to you, which means it doesn't get transferred to the new owner of your computer (except the operating system). In order to avoid complications with the new owner attempting to download and install software that is licensed by you, make sure to sign out of everything your personal information is connected to.
How to sign out of iTunes (macOS Mojave and older)
How to sign out of iMessage
How to sign out of iCloud
Step 3: Unpair your Bluetooth devices
If you're keeping your Bluetooth devices, you don't want to leave them paired to a Mac that you're getting rid of. It isn't really that important of a step, but if you sell your old Mac to, say, a roommate or someone living in the same house as you, you may experience accidentally connecting back to it.
Note: If you're unpairing a keyboard, trackpad, or mouse on a desktop Mac, be sure to have a wired one plugged in or you won't be able to type or use a curser and you'll have to repair it all again.
Step 4: Erase your hard drive
Once your data is backed up and you've signed out of everything that might connect your old Mac to your personal information, you can erase everything on it by reformatting the hard drive.
Repeat this process for all data disks under your startup disk. Do not use Delete Volume Group. Once you've deleted all of your data drives, you'll move on to erasing your startup disk.
![]()
Source: Christine Romero-Chan / iMore
After you erase your hard drive it will be ready for a clean installation of the operating system. You should already be in the Utilities window after erasing your Mac. If not, restart your computer and hold down Command and R at the same time until you see the Apple logo.
Make sure to reinstall macOS through Recovery Mode, holding down Command+R. You may be asked to sign in with your Apple ID.
If you get stuck during reinstallation, see our troubleshooting section for additional help.
Note: Make sure your Mac is connected to the internet in order to verify the software. You'll be asked to do so during the installation process.
If, while reinstalling macOS, you're asked to enter a password, enter the password you use to unlock your Mac, not your Apple ID.
Your Mac is now clean and ready for a new owner. They will complete the setup instructions to get started using the Mac, as well as download the latest macOS operating system that is available and supported on their Mac.
Troubleshooting erasing your hard drive or reinstalling macOS
I've gotten a lot of very specific questions about issues some readers have with erasing or reinstalling macOS (usually reinstalling). Sometimes, the easiest way to fix issues with reinstalling macOS is to start by holding Shift+Option+Command+R which will put your Mac into an alternate version of Recovery Mode that allows you to install the original macOS that came with your Mac. From here, you can either keep that operating system and let the new owner update to their preferred macOS, or go through the macOS update process.
If, during the macOS reinstallation process, the installer doesn't see your disk or says you can't install the operating system on the disk, you may need to try erasing your hard drive again. Restart your Mac and hold down Command+R to bring up Recovery mode and repeat Step 4.
Since macOS changed to APFS, some readers have struggled with which format option to choose when erasing their disk. Here are some other possible troubleshooting issues from Apple's support document that may help you.
Are you formatting the disk that came built into your Mac?
If the built-in disk came APFS-formatted, don't change it to Mac OS Extended.
Are you about to install macOS High Sierra or later on the disk?
If you need to erase your disk before installing High Sierra or later for the first time on that disk, choose Mac OS Extended (Journaled). During installation, the macOS installer decides whether to automatically convert to APFS—without erasing your files:
Are you preparing a Time Machine backup disk or bootable installer?
Choose Mac OS Extended (Journaled) for any disk that you plan to use with Time Machine or as a bootable installer.
Will you be using the disk with another Mac?
If the other Mac isn't using High Sierra or later, choose Mac OS Extended (Journaled). Earlier versions of macOS don't mount APFS-formatted volumes.
To learn which format is currently in use, use any of these methods:
If you're still having trouble with either erasing your hard drive or reinstalling macOS, please reach out to us in the forums. We have a wonderful community of Apple users that are happy to help someone in need.
Any questions?
Is there anything about resetting your Mac to prepare it for sale that you need help with? Let me know in the comments and I'll get you squared away.
Updated May 2020: Updated for macOS Catalina.
macOS CatalinaMain
We may earn a commission for purchases using our links. Learn more.
So many ports
Plugable's UD-6950Z Dock may be built for Windows but it saved my Mac
I had to jump through hoops to uninstall the macOS developer beta and reinstall Catalina and the Plugable docking station made it all possible.
It is that time again. Time to decide whether to keep or replace your Mac laptop or desktop computer. If you are reading this article, chances are you've already come to the decision to replace your Mac with the newes model (or maybe you just got a new Mac as a present!), and you're thinking about selling your old one.
The first thing you should do before hitting the streets to sell your old Mac is clear it of any and all personal data. You don't want to accidentally sell your computer to a stranger when you are still logged into iCloud.
The next step is to reinstall the Mac's operating system so that the new owner can get started without having to figure out how to start up in recovering mode. Believe me, that can be a pain.
If you're going through the process of erasing your old Mac and reinstalling the operating system, we've got some common troubleshooting tips to help you out. Don't forget to follow the additional steps if you're selling a MacBook with Touch ID.
Clean the Mac of your personal data before erasing it
If you're about to sell your old Mac, the one thing you don't want to do is to give away the data you've been storing on it all these years. It's a security and privacy thing for you, but it's also important for the buyer. If you leave behind anything that needs to be logged into with a password, that buyer is going to have to track you down and get your password in order to change ownership. A completely fresh-from-scratch Mac is the best way to do this.
Step 1: Back up your Mac
If you already have your new Mac on hand, you can transfer all of your data from your old Mac or use an older Time Machine backup. If you don't have your new Mac yet, well .. then you probably shouldn't be selling your old one yet. But, if you really don't think you'll need your old computer before getting your new one, just make sure to back up your data so that nothing happens to it before you get what you need onto your new Mac.
Step 2: Sign out of everything
The software you have on your Mac is licensed to you, which means it doesn't get transferred to the new owner of your computer (except the operating system). In order to avoid complications with the new owner attempting to download and install software that is licensed by you, make sure to sign out of everything your personal information is connected to.
How to sign out of iTunes (macOS Mojave and older)
How to sign out of iMessage
How to sign out of iCloud
Step 3: Unpair your Bluetooth devices
If you're keeping your Bluetooth devices, you don't want to leave them paired to a Mac that you're getting rid of. It isn't really that important of a step, but if you sell your old Mac to, say, a roommate or someone living in the same house as you, you may experience accidentally connecting back to it.
Note: If you're unpairing a keyboard, trackpad, or mouse on a desktop Mac, be sure to have a wired one plugged in or you won't be able to type or use a curser and you'll have to repair it all again.
Step 4: Erase your hard drive
Once your data is backed up and you've signed out of everything that might connect your old Mac to your personal information, you can erase everything on it by reformatting the hard drive.
Repeat this process for all data disks under your startup disk. Do not use Delete Volume Group. Once you've deleted all of your data drives, you'll move on to erasing your startup disk.
Source: Christine Romero-Chan / iMore
After you erase your hard drive it will be ready for a clean installation of the operating system. You should already be in the Utilities window after erasing your Mac. If not, restart your computer and hold down Command and R at the same time until you see the Apple logo.
Make sure to reinstall macOS through Recovery Mode, holding down Command+R. You may be asked to sign in with your Apple ID.
If you get stuck during reinstallation, see our troubleshooting section for additional help.
Note: Make sure your Mac is connected to the internet in order to verify the software. You'll be asked to do so during the installation process.
If, while reinstalling macOS, you're asked to enter a password, enter the password you use to unlock your Mac, not your Apple ID.
Your Mac is now clean and ready for a new owner. They will complete the setup instructions to get started using the Mac, as well as download the latest macOS operating system that is available and supported on their Mac.
![]() Troubleshooting erasing your hard drive or reinstalling macOS
I've gotten a lot of very specific questions about issues some readers have with erasing or reinstalling macOS (usually reinstalling). Sometimes, the easiest way to fix issues with reinstalling macOS is to start by holding Shift+Option+Command+R which will put your Mac into an alternate version of Recovery Mode that allows you to install the original macOS that came with your Mac. From here, you can either keep that operating system and let the new owner update to their preferred macOS, or go through the macOS update process.
If, during the macOS reinstallation process, the installer doesn't see your disk or says you can't install the operating system on the disk, you may need to try erasing your hard drive again. https://intensivevirgin447.weebly.com/blog/7-zip-software-for-mac. Restart your Mac and hold down Command+R to bring up Recovery mode and repeat Step 4.
Since macOS changed to APFS, some readers have struggled with which format option to choose when erasing their disk. Here are some other possible troubleshooting issues from Apple's support document that may help you.
Are you formatting the disk that came built into your Mac?
If the built-in disk came APFS-formatted, don't change it to Mac OS Extended.
Are you about to install macOS High Sierra or later on the disk?
If you need to erase your disk before installing High Sierra or later for the first time on that disk, choose Mac OS Extended (Journaled). During installation, the macOS installer decides whether to automatically convert to APFS—without erasing your files:
Are you preparing a Time Machine backup disk or bootable installer?
Choose Mac OS Extended (Journaled) for any disk that you plan to use with Time Machine or as a bootable installer.
Will you be using the disk with another Mac?
If the other Mac isn't using High Sierra or later, choose Mac OS Extended (Journaled). Earlier versions of macOS don't mount APFS-formatted volumes.
To learn which format is currently in use, use any of these methods:
If you're still having trouble with either erasing your hard drive or reinstalling macOS, please reach out to us in the forums. We have a wonderful community of Apple users that are happy to help someone in need.
Any questions?
Is there anything about resetting your Mac to prepare it for sale that you need help with? Let me know in the comments and I'll get you squared away.
Updated May 2020: Updated for macOS Catalina.
How To Reinstall Mac Os From InternetmacOS CatalinaDoes Resetting A Mac Reinstall The Original Os Software Windows 7Main
We may earn a commission for purchases using our links. Learn more.
So many ports
How Do I Reinstall OsPlugable's UD-6950Z Dock may be built for Windows but it saved my MacDoes Resetting A Mac Reinstall The Original Os Software Download
I had to jump through hoops to uninstall the macOS developer beta and reinstall Catalina and the Plugable docking station made it all possible.
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