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Download Mac Os Sierra Installer10/24/2021
Mac OS X Lion icon pack, the latest version: Windows Vista Personalized with Mac icons. Install the required packages. Get your Mac in on Game Center.Full screen apps. OS X Mountain Lion brings a lot of great things from iPhone, iPad, and iPod touch to the Mac. Mac OS X Mountain Lion (version 10.8) is the nineth major release of Mac OS X (now named macOS), Apple’s desktop and server operating system for Macintosh computers. 10 Download OS X Mountain Lion.Prepare a clean external drive (at least 10 GB of storage). Start your Mac holding down Command + R. The following method allows you to download Mac OS X Lion, Mountain Lion, and Mavericks.But after macOS High Sierra macOS Mojave released. When macOS High Sierra released contained many germs, and from the passing of time, fixed. Enter your Apple ID.Download macOS High Sierra 10.13.6 DMG file Full Download MacOS High Sierra 10.13.6 DMG File. Select external drive as a source.
Time Machine is one option for a backup just make sure Time Machine has been run shortly before you start the downgrade. Back Up Your Current DataBecause of the need to erase your startup drive, the downgrade process should start with backing up all of your data. The volumes that currently house your copy of macOS Catalina will have to be erased in order to convert the two special Catalina volumes (one read-only system volume and one read/write data volume) back to a format that is usable by the earlier versions of the Mac OS. Use Time Machine to restore from a date when your Mac was using a previous version of the o perating system.With any of the downgrade methods, you’re going to lose all the data currently on your Mac. Reinstall a previous version of the Mac OS using the appropriate Mac OS Installer. Sierra Er How To Create TheThere should be an option available to continue the download. Do not allow it to start the install process.Note: You may see a warning about downloading an older version of the operating system. If the installer starts up automatically, be sure to quit the installer. You can find the installers available at:Download the installer of your choice. If you go the clone route, make sure the cloning software you use is both APFS and macOS Catalina compatible Carbon Copy Cloner and SuperDuper are two good possibilities.The Mac OS installers are still available from the Mac App Store, provided you know the download URL.We can show you how to create the bootable installer, but first you’ll need to download the macOS installer from the Mac App Store. How to Make a macOS Sierra USB Install DriveOnce you have the bootable installer and a current backup, you’re ready to start the downgrade process. Create a Bootable macOS High Sierra Install Drive How to Create a Bootable macOS Mojave Install Drive Create the Bootable InstallerYou’ll need a USB flash drive with a minimum of 8 GB of storage space and preferably, but not a requirement, a USB 3.0 port.With the installer downloaded and the USB flash drive in hand, follow the appropriate instructions linked below: Macs equipped with the T2 security chip need to have a security setting altered to allow the use of bootable external devices.If your Mac is equipped with a T2 chip, and most current Macs are, you’ll need to check the Rocket Yard guide:Follow the instructions in the T2-Equipped Macs section.You can change the T-2 Security Chip settings from the Recovery utility. Make sure you have on hand any network or Wi-Fi passwords you may need to make the network connection.Restart your Mac while holding down the Option + Command + R keys. Trying to erase and reformat the drive that also contains the Recovery volume can lead to some interesting error messages that are best to avoid.Instead, use Internet Recovery, which runs from RAM memory, freeing you to use Disk Utility to completely erase the startup drive. The problem is that the Recovery volume is part of the same APFS-formatted drive that houses the system volume and data volume you need to remove. You may be tempted to use the normal Recovery volume that Catalina installs on your Mac. To ensure earlier versions of the OS can be installed, you need to erase and reformat the startup drive to remove the split volume architecture used in Catalina.This can be done using the Mac’s Internet Recovery system. Hit the return key to boot from the installer.Booting from the USB flash drive may take a while eventually, the macOS Utilities window will be displayed. Use the arrow button to select the USB flash drive that contains the macOS installer. Boot from the installer then follow the steps above starting at: “From the macOS Utilities window that opens…” Install Mac OSWith the startup drive erased, you’re ready to install the earlier version of the macOS.Connect the bootable macOS installer you made earlier to your Mac.If your Mac is still booted into recovery mode, quit recovery by selecting Quit macOS Utilities from the macOS Utilities menu.Restart your Mac while holding down the option key.Continue to hold the option key down until you see the Mac’s Boot Manager appear.The Boot Manager will display a list of connected bootable devices. Remember, this will erase everything on the startup drive.From the macOS Utilities window that opens, select Disk Utility, then click the Continue button.In the Disk Utility window, select Show All Devices from the View menu, or use the View button on the toolbar.In the Disk Utility sidebar, select the Mac’s startup drive (not the volume or the container, but the top-most item in the startup drive hierarchy).In the sheet that drops down, give the drive a name, set the format to Mac OS Extended (Journaled), and the Scheme to GUID Partition Map.Note : I’m suggesting Mac OS Extended (Journaled) because it can be used to install Mojave, High Sierra, and Sierra, though Mojave may convert the format to APFS during the installation process.Once the erase is complete, you can quit Disk Utility.Tip : If you don’t have a reliable Internet connection, you can use a bootable macOS High Sierra, Mojave, or Catalina installer. This process takes a while, so be patient.Be sure to select the startup drive in Disk Utility’s sidebar, and not the Container or Volumes. Select your Time Machine drive and click Continue.A list of restore points will be displayed, organized by date as well as the OS version that was in use. If not, restart your Mac using the recovery partition, as outlined above.Make sure your Time Machine backup drive is connected to your Mac.In the macOS Utility window, select Restore From Time Machine Backup, and then click the Continue button.The Restore from Time Machine Backup option will present some basic information once you’ve read it, click the Continue button.A list of restore sources will be displayed. Perform the steps outlined in Erase and Restore the Startup Drive, listed above.You can use Time Machine to restore your Mac to a previous version of the OS, along with all of your user data.When you get to where you quit Disk Utility, jump back to this point and continue from here.The macOS Utility window should be open. (You won’t have any data newer than that date.)To Use Time Machine to restore from a previous backup point, you still need to erase and format the Catalina startup drive to remove the split system volume and the APFS formatting. Use Time Machine to DowngradeIf you’ve been using Time Machine for your backups, it may be possible to restore from an earlier backup, when you were using an older operating system on your Mac.The advantage to this method is that not only will you end up with an earlier version of the Mac OS, but you will also have all your data from that time restored as well. The macOS installer will start up and walk you through the installation of the version of the Mac OS contained on the installer. Ru still down downloadThis can take a while when it’s complete, your Mac will restart. When you’re ready, click the Restore button.The restore process will start. Select the drive you wish to use as the destination for the restore this will normally be the startup drive you erased earlier. ![]()
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