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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.
Learn how to upgrade to macOS Big Sur, the latest version of macOS.
Check compatibility
The version of macOS that came with your Mac is the earliest version it can use. For example, if your Mac came with macOS Big Sur, it will not accept installation of macOS Catalina or earlier.
If a macOS can't be used on your Mac, the App Store or installer will let you know. 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. To confirm compatibility before downloading, check the minimum hardware requirements:
- macOS Catalina 10.15 hardware requirements
- macOS Mojave 10.14 hardware requirements
- macOS High Sierra 10.13 hardware requirements
- macOS Sierra 10.12 hardware requirements
- OS X El Capitan 10.11 hardware requirements
- OS X Yosemite 10.10 hardware requirements
Download macOS using Safari on your Mac
Safari uses these links to find the old installers in the App Store. After downloading from the App Store, the installer opens automatically.
- macOS Catalina 10.15 can upgrade Mojave, High Sierra, Sierra, El Capitan, Yosemite, Mavericks
- macOS Mojave 10.14 can upgrade High Sierra, Sierra, El Capitan, Yosemite, Mavericks, Mountain Lion
- macOS High Sierra 10.13 can upgrade Sierra, El Capitan, Yosemite, Mavericks, Mountain Lion
Safari downloads the following older installers as a disk image named InstallOS.dmg or InstallMacOSX.dmg. Open the disk image, then open the .pkg installer inside the disk image. It installs an app named Install [Version Name]. Open that app from your Applications folder to begin installing the operating system.
- macOS Sierra 10.12 can upgrade El Capitan, Yosemite, Mavericks, Mountain Lion, or Lion
- OS X El Capitan 10.11 can upgrade Yosemite, Mavericks, Mountain Lion, Lion, or Snow Leopard
- OS X Yosemite 10.10can upgrade Mavericks, Mountain Lion, Lion, or Snow Leopard
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Vintage Macintosh Software

If you’re looking for old Mac software, there are a number of sites on the interwebs that are worth checking out:
Macintosh Garden– great site for old Mac games, system software and abandoned applications
Rescue My Classic Mac – old Macintosh boot floppies and applications available for purchase
Macintosh Repository – a sanctuary for old software of the classic Mac OS era
Mac GUI – customize your Mac’s look and feel with Themes, Desktops, Icons, Widgets, etc..
Mac OS 9 Lives – tips and software for running the Classic Mac OS; audio-centric focus
U-Mich Software Archives – large legacy software collection, for Macs and other platforms
Max1zzz’s Classic Mac Server – another vast collection of Mac system and application software
The Gryphel Project – 68k era Mac software and home of the Mini VMac Mac Plus emulator
E-Maculation – dedicated to emulation of the classic Macintosh computer in OS X, Windows and Linux
OldApps.com – installers for superceded and obsoleted Mac OS X software
PowerPC Software Archive– links to the most current PowerPC compatible versions of many programs
The Mac Driver Museum – old hardware drivers for Mac printers, disks, video cards and related items (partial archive)
MacFixer Mac Software Library – a growing compendium of early Mac system, utility and game installers
The Internet Archive – the grand attic of the internet adds software to its collection
Mac OS 9.2.2 for PowerMac G4 MDD– Retail Mac OS 9 installers do not work on the last generation PowerMac G4 MDD models. This is a copy of Mac OS 9.2.2 included on the MDD bundled Software Restore CDs which is able to boot these G4 models into OS 9 (FireWire 400 models only). It can also be used as Classic Mode on any PowerMac running Mac OS X 10.1-10.4.
ProTools 3.4 Free– Pro Tools 3.4 Digital Audio Workstation software was released free of charge by Digidesign in 1997. This is a fully-functional 16-track version of the program which runs on many 68k Nubus Macs and old PCI PowerMacs.
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SoundApp – a swiss army knife for old sound files. Play and convert many vintage audio formats with this useful utility.
Classilla and TenFourFox – ports of the current Firefox web browser, optimized for Mac OS 9 (Classilla) and PowerPC Macs running OS X Tiger (TenFourFox). Get online with your vintage Mac!
PrintToPDF– a free utility to create PDF files on classic Macs running System 7 through Mac OS 9. This is a handy way to keep the formatting of old documents you can’t otherwise convert.
The Vintage Mac Museum is a private, working collection of the pre-Intel Apple Macintosh. We provide old Mac file transfer and conversion services, along with research into old Mac technologies for patent prior art searches or academic purposes.