Before initiating a Mac OS E El Capitan download and installation, you need to ensure that your Mac can run the operating system. For starters, if your Mac is listed here below, it should be able to run the El Capitan operating system: Late 2008 or newer MacBook or MacBook Air; Mid 2007 MacBook Pro or iMac; Early 2009 or newer Mac Mini or XServe. But first, we'll tell you why you might need to download an older version of macOS or OS X. The software that you're relying on might not be working properly, and thus the need for the older macOS version comes. Also, you might be a developer, and so you'll need to run your software on multiple mac OS versions to ascertain that the software is OK.

Quickstart

1. Install Xcode and the Xcode Command Line Tools
2. Agree to Xcode license in Terminal: sudo xcodebuild -license
3. Install MacPorts for your version of the Mac operating system:

Installing MacPorts

MacPorts version 2.6.4 is available in various formats for download and installation (note, if you are upgrading to a new major release of macOS, see the migration info page):

• “pkg” installers for Big Sur, Catalina, Mojave, and High Sierra, for use with the macOS Installer. This is the simplest installation procedure that most users should follow after meeting the requirements listed below. Installers for legacy platforms Sierra, El Capitan, Yosemite, Mavericks, Mountain Lion, Lion, Snow Leopard, Leopard and Tiger are also available.
• In source form as either a tar.bz2 package or a tar.gz one for manual compilation, if you intend to customize your installation in any way.
• Git clone of the unpackaged sources, if you wish to follow MacPorts development.
• The selfupdate target of the port(1) command, for users who already have MacPorts installed and wish to upgrade to a newer release.

Checksums for our packaged downloads are contained in the corresponding checksums file.

The public key to verify the detached GPG signatures can be found under the attachments section on jmr's wiki page. (Direct Link).

Please note that in order to install and run MacPorts on macOS, your system must have installations of the following components:

1. Apple's Xcode Developer Tools (version 12.2 or later for Big Sur, 11.3 or later for Catalina, 10.0 or later for Mojave, 9.0 or later for High Sierra, 8.0 or later for Sierra, 7.0 or later for El Capitan, 6.1 or later for Yosemite, 5.0.1 or later for Mavericks, 4.4 or later for Mountain Lion, 4.1 or later for Lion, 3.2 or later for Snow Leopard, or 3.1 or later for Leopard), found at the Apple Developer site, on your Mac operating system installation CDs/DVD, or in the Mac App Store. Using the latest available version that will run on your OS is highly recommended, except for Snow Leopard where the last free version, 3.2.6, is recommended.

2. Apple's Command Line Developer Tools can be installed on recent OS versions by running this command in the Terminal:

   Older versions are found at the Apple Developer site, or they can be installed from within Xcode back to version 4. Users of Xcode 3 or earlier can install them by ensuring that the appropriate option(s) are selected at the time of Xcode's install ('UNIX Development', 'System Tools', 'Command Line Tools', or 'Command Line Support').

3. Xcode 4 and later users need to first accept the Xcode EULA by either launching Xcode or running:
4. (Optional) The X11 windowing environment for ports that depend on the functionality it provides to run. You have multiple choices for an X11 server:
   • Install the xorg-server port from MacPorts (recommended).
   • The XQuartz Project provides a complete X11 release for macOS including server and client libraries and applications. It has however not been updated since 2016.
   • Apple's X11.app is provided by the “X11 User” package on older OS versions. It is always installed on Lion, and is an optional installation on your system CDs/DVD with previous OS versions.

macOS Package (.pkg) Installer

The easiest way to install MacPorts on a Mac is by downloading the pkg or dmg for Big Sur, Catalina, Mojave, High Sierra, Sierra, El Capitan, Yosemite, Mavericks, Mountain Lion, Lion, Snow Leopard, Leopard or Tiger and running the system's Installer by double-clicking on the pkg contained therein, following the on-screen instructions until completion.

This procedure will place a fully-functional and default MacPorts installation on your host system, ready for usage. If needed your shell configuration files will be adapted by the installer to include the necessary settings to run MacPorts and the programs it installs, but you may need to open a new shell for these changes to take effect.

The MacPorts “selfupdate” command will also be run for you by the installer to ensure you have our latest available release and the latest revisions to the “Portfiles” that contain the instructions employed in the building and installation of ports. After installation is done, it is recommended that you run this step manually on a regular basis to to keep your MacPorts system always current:

At this point you should be ready to enjoy MacPorts!

Type “man port” at the command line prompt and/or browse over to our Guide to find out more information about using MacPorts. Help is also available.

Source Installation

If on the other hand you decide to install MacPorts from source, there are still a couple of things you will need to do after downloading the tarball before you can start installing ports, namely compiling and installing MacPorts itself:

1. “cd” into the directory where you downloaded the package and run “tar xjvf MacPorts-2.6.4.tar.bz2” or “tar xzvf MacPorts-2.6.4.tar.gz”, depending on whether you downloaded the bz2 tarball or the gz one, respectively.
2. Build and install the recently unpacked sources:
   • cd MacPorts-2.6.4
   • ./configure && make && sudo make install
   Optionally:
   • cd ../
   • rm -rf MacPorts-2.6.4*

These steps need to be perfomed from an administrator account, for which “sudo” will ask the password upon installation. This procedure will install a pristine MacPorts system and, if the optional steps are taken, remove the as of now unnecessary MacPorts-2.6.4 source directory and corresponding tarball.

To customize your installation you should read the output of “./configure --help | more” and pass the appropriate options for the settings you wish to tweak to the configuration script in the steps detailed above.

You will need to manually adapt your shell's environment to work with MacPorts and your chosen installation prefix (the value passed to configure's --prefix flag, defaulting to /opt/local):

• Add ${prefix}/bin and ${prefix}/sbin to the start of your PATH environment variable so that MacPorts-installed programs take precedence over system-provided programs of the same name.
• If a standard MANPATH environment variable already exists (that is, one that doesn't contain any empty components), add the ${prefix}/share/man path to it so that MacPorts-installed man pages are found by your shell.
• For Tiger and earlier only, add an appropriate X11 DISPLAY environment variable to run X11-dependent programs, as Leopard takes care of this requirement on its own.

Lastly, you need to synchronize your installation with the MacPorts rsync server:

Upon completion MacPorts will be ready to install ports!

It is recommended to run the above command on a regular basis to keep your installation current. Type “man port” at the command line prompt and/or browse over to our Guide to find out more information about using MacPorts. Help is also available.

Git Sources

If you are developer or a user with a taste for the bleeding edge and wish for the latest changes and feature additions, you may acquire the MacPorts sources through git. See the Guide section on installing from git.

Purpose-specific branches are also available at the https://github.com/macports/macports-base/branches url.

Alternatively, if you'd simply like to view the git repository without checking it out, you can do so via the GitHub web interface.

Selfupdate

If you already have MacPorts installed and have no restrictions to use the rsync networking protocol (tcp port 873 by default), the easiest way to upgrade to our latest available release, 2.6.4, is by using the selfupdate target of the port(1) command. This will both update your ports tree (by performing a sync operation) and rebuild your current installation if it's outdated, preserving your customizations, if any.

Other Platforms

Running on platforms other than macOS is not the main focus of The MacPorts Project, so remaining cross-platform is not an actively-pursued development goal. Nevertheless, it is not an actively-discouraged goal either and as a result some experimental support does exist for other POSIX-compliant platforms such as *BSD and GNU/Linux.

The full list of requirements to run MacPorts on these other platforms is as follows (we assume you have the basics such as GCC and X11):

• Tcl (8.4 or 8.5), with threads.
• mtree for directory hierarchy.
• rsync for syncing the ports.
• cURL for downloading distfiles.
• SQLite for the port registry.
• GNUstep (Base), for Foundation (optional, can be disabled via configure args).
• OpenSSL for signature verification, and optionally for checksums. libmd may be used instead for checksums.

Normally you must install from source or from an git checkout to run MacPorts on any of these platforms.

Help

Help on a wide variety of topics is also available in the project Guide and through our Trac portal should you run into any problems installing and/or using MacPorts. Of particular relevance are the installation & usage sections of the former and the FAQ section of the Wiki, where we keep track of questions frequently fielded on our mailing lists.

If any of these resources do not answer your questions or if you need any kind of extended support, there are many ways to contact us!

Get an ultimate backup app

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.

You may find that after the latest update your computer runs slower, your apps don’t function, or that the programs you need to run are not yet compatible with the upgrade. 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.

Keep your apps while downgrading

Get Setapp, a collection of Mac apps that strengthen your macOS. Whenever you decide to downgrade, your apps will travel with you.

How to Install Old OS X on Your Mac

Although you might think that going back to the old macOS is not possible by looking at the App Store Updates tab, it’s actually quite easy to do. In this article, we’ll take you through everything you need to download and install an old OS X on your Mac.

Prepare your Mac first

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’ll need around around eight gigabytes free depending on which macOS you downgrade to.

Even if you do have enough space, it’s a good idea to clean your computer before installing the desired operating system. 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.

Optimizing your Mac with CleanMyMac is effortless:

1. Launch CleanMyMac
2. Select the Smart Scan tab and click Scan
3. Review Details to see the list of suggested optimizations
4. Click Clean

To uninstall certain apps, find the Uninstaller tab and select the apps you haven’t been using for a while.

Download CMM X to prepare for Big Sur

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.

To create a new backup with Get Backup Pro:

1. Connect your external hard drive
2. Click the plus icon in the bottom left corner
3. Type in the name for your backup
4. Choose your external drive as a destination
5. Adjust all the settings according to your preference and click OK
6. Tap the play button once you ready to perform the backup

Grab an old macOS with Setapp

Downgrading to previous operating systems on Mac gets easier. To put it shortly, Setapp has your back here.

Download the OS X you want

Once you have space on your computer, figure out what version of OS X you would like to install. You can see all previous versions of OS X your Mac has installed by opening up the App Store and clicking the icon in Applications. 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.

What if I can’t find the version I want in the app store?

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. The earliest versions, OS X Lion and OS X Mountain Lion are available on the Apple Store’s website and arrive to you via email for download. 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 2017:

• OS X High Sierra 10.13
• OS X Sierra 10.12
• OS X ElCapitan 10.11
• OS X Yosemite 10.10
• OS X Mavericks 10.9
• OS X Mountain Lion 10.8
• OS X Lion 10.7, released in 2011

Visiting the Apple Support’s Downloads page makes it easy to search for any version of macOS you might need, and most are available for free. Downloads for previous versions of OS X are linked below and include:

Alternative sources for downloading macOS

If you can’t find the version you want from Apple, ask a friend who is running the macOS you’re looking for to make a copy of the installer file for you. Downloading a .dmg file from a torrent site may seem a quick solution, but it means risking your security. Alternatively, you could hit up your nearest Apple Store. They will likely have image files of all the different versions of the software and help you install it right there as well.

Install the macOS

If you download the file from the App Store, the installer will start immediately. Follow the prompts and be prepared to restart your computer. If you acquire the installer from another source, just downloading the file will not install the OS X right away on your Mac, you’ll need to find the file in your Downloads or Applications folder, then open and run the installer from the downloaded file.

I can’t download an old version of Mac OS X

A downgrade is different than an upgrade. When you try to downgrade macOS, the installer may not launch right away depending on which versions of macOS you are moving between. If your installer does not launch, or you get an error message that reads: “This copy of the ‘Install OS X’ application is too old to be opened on this version of OS X,” you’ll need to use a bootable USB or external drive to work around this problem.

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Get a bootable drive with OS X

Creating a bootable USB or a bootable drive is not complicated. You’ll need an external drive with enough space to hold your desired OS X on it and a basic familiarity with Terminal, Apple’s command line interface.

If you’re uncomfortable using Terminal to execute basic commands, use an app like Disk Drill to help create a boot drive. Whether you use Terminal or Disk Drill, our guide on creating a bootable installer will walk you through all the necessary steps.

Remove the old OS X

Once your drive is prepared with your bootable version of OS X, erase the unwanted version. After you restart your computer, press and hold Command + R. When you enter the macOS Utilities screen, navigate to Disk Utility, click continue, and find your Startup Disk. Tab to the Erase page and name the file you want erased (e.g. macOS High Sierra). Then select Mac OS Extended (Journaled) from the dropdown menu. Hit Erase and quit out of Disk Utility. This will return you to the OS X Utilities selector.

Install the bootable version of OS X

If you used Disk Drill for creating your bootable drive, a window will prompt your actions for using the install disk you made. But if you created your own using Terminal, use OS X Utilities Selector and find Reinstall OS X. Find and select your install disk with your bootable version of your preferred macOS, and click continue through to the license agreement. Once you agree, you should be prompted by the installer. Once the installation is completed, your computer should restart. If it does not restart itself, make sure you restart it normally. The downgrade should be complete!

As you can see, downgrading your OS X is not as dreadful as you might think, especially if you use helper apps like CleanMyMac, Get Backup Pro, and Disk Drill — all of which are available for a free trial on Setapp. So downgrade away!

macOS evolution inforgaphic

Meantime, prepare for all the awesome things you can do with Setapp.

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