Clicking the apple in the top left corner of your desktop and selecting About This Mac will allow you to see what OS X version you are currently running. Tabbing over to Storage will let you know how much disk space you have available. You can, of course, do so manually by deleting unused files and uninstalling old software to free up disk space.
Depending on how tidy you are, this might take quite a bit of time. To make things easy, use a specialized app like CleanMyMac, which will quickly free up space by detecting unused apps and large files, and offering to completely delete them, with all their hidden corresponding files, in one quick click.
The only solution that will free up disk space, remove duplicates, and solve tons of problems to prepare your Mac for a new macOS. The final preparation step is to make sure you back up all your important files to cloud storage or an external drive. A proper backup app like Get Backup Pro can save you a lot of headache here. Downgrading to previous operating systems on Mac gets easier.
To put it shortly, Setapp has your back here. Once you have space on your computer, figure out what version of OS X you would like to install. Tab to the Purchase page of the menu and scroll down to find the line for previous operating systems.
Clicking the install button of the macOS you want will begin downloading the file. If your goal is to download a version of macOS that you have not already used, or, that was not available as an update from the App Store after you bought your Mac, you may need to purchase it. OS X Snow Leopard ships as a boxed version and requires a disk drive to install. It could be helpful to know where you sit on the timeline of macOS X updates. Below is a chronological list of all the updates beginning with the most recent update, High Sierra, released in The best and easiest option is to create a bootable USB drive.
This could be an external hard drive or a thumb drive. You can also burn installation files to DVD, but this will take longer to install. Check out our full guide to making a bootable copy of macOS to see how this is done. This does the same thing as using Terminal commands but with a simple graphical interface.
To that, you need to select it when your Mac starts up. If you want to install an older version of macOS on your main drive, you need to completely wipe it first. Now, when you head back to the macOS installer, you should be able to install the older version of OS X on your main disk. If you need to run an older version of OS X to use older third-party software, consider looking for alternatives that run on the latest versions instead.
That way, downgrading might not be necessary at all. With over 5 years of supporting Mac users, Ruslana lives and breathes everything Mac. It installs an app named Install Version Name. Open that app from your Applications folder to begin installing the operating system. Running the latest software is not always the best decision. There are plenty of reasons you might want to downgrade or run an older version of macOS on your computer.
Maybe as a developer, you want to create a test environment to ensure your software runs properly in all available versions of OS X - check out the infographic below. Or you may simply like the look of the old version better no judgement and not want to upgrade until absolutely necessary.
Get Setapp, a collection of Mac apps that strengthen your macOS. Whenever you decide to downgrade, your apps will travel with you. Make sure you are ready to downgrade your operating system by checking in with what version of OS X you already have and ensuring you have enough hard drive room to download the older version. Clicking the apple in the top left corner of your desktop and selecting About This Mac will allow you to see what OS X version you are currently running.
Tabbing over to Storage will let you know how much disk space you have available. You can, of course, do so manually by deleting unused files and uninstalling old software to free up disk space. Depending on how tidy you are, this might take quite a bit of time. To make things easy, use a specialized app like CleanMyMac, which will quickly free up space by detecting unused apps and large files, and offering to completely delete them, with all their hidden corresponding files, in one quick click.
The only solution that will free up disk space, uninstall bit apps, and solve tons of problems to prepare your Mac for a new macOS. The final preparation step is to make sure you back up all your important files to cloud storage or an external drive. This will put an installation app in your Applications folder, which you should leave there. If you have a valid Apple Developer account, you might be able to download older versions from developer.
Apple will email you an unlock code, which you can redeem in the Mac App Store. Some websites might offer old versions of OS X for download, but we recommend avoiding them. First, the installer might contain malware. Second, there are legal concerns: OS X is still copyrighted software.
Even if you own a license, you might not be able to legally download it in your jurisdiction. If you can, you might not be able to legally use BitTorrent to download it, as your BitTorrent client will be uploading parts of OS X to other people during the download process.
You can change various parts of this command to suit your own circumstances, with the main one being the name of the installer. Be aware that any spaces will need to be preceded by a backslash. You can run the ls command to list all connected volumes, which will include your USB installation medium in case you need to check the label.
First, insert your USB drive and turn off your Mac. They are as follows:. Once macOS loads You might need to select a language first. Follow the rest of the prompts to finish the installation. This is one of the few things that you can try to improve performance on an old Mac.
Browse All iPhone Articles Browse All Mac Articles To get the latest features and maintain the security, stability, compatibility, and performance of your Mac, it's important to keep your software up to date. Apple recommends that you always use the latest macOS that is compatible with your Mac. The version of macOS that came with your Mac is the earliest version it can use.
For example, it might say that it's not compatible with this device or is too old to be opened on this version of macOS.
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