How to do a regular install of macOS Catalina. Check that your Mac can run Catalina. Here’s the list of compatible Macs: MacBook 2015 and later. MacBook Air 2012 and later. MacBook Pro 2012 and later. IMac 2012 and later. IMac Pro 2017 and later. Mac Pro 2013 and later. Make sure you’re connected to the internet and have a reliable.

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.

• Last week I installed catalina on my iMac (late 2009). Back then I had a hard drive. Yesterday I installed a new SSD in it and also new RAM (from 4GB 1060mhz to 8GB 1333mhz). I used the usb that I also used to install catalina on the hard drive. I booted the USB and pressed install macOS Catalina.
• IMac Pro (2017) If you are running from Lion or Mountain, you need to upgrade to El Capitan first before you upgrade to macOS Catalina. The installer will let you know if your device is not compatible with macOS Catalina. Create a backup. Now that you are ready to upgrade to Catalina, it’s wise to make a backup before any upgrade.

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

If you're using one of these computers with OS X Mavericks or later, you can install macOS Catalina. Your Mac also needs at least 4GB of memory and 12.5GB of available storage space, or up to 18.5GB of storage space when upgrading from OS X Yosemite or earlier. Learn how to upgrade to macOS Catalina.

MacBook Pro

• MacBook Pro (13-inch, 2020, Two Thunderbolt 3 ports)
• MacBook Pro (13-inch, 2020, Four Thunderbolt 3 ports)
• MacBook Pro (16-inch, 2019)
• MacBook Pro (13-inch, 2019, Two Thunderbolt 3 ports)
• MacBook Pro (15-inch, 2019)
• MacBook Pro (13-inch, 2019, Four Thunderbolt 3 ports)
• MacBook Pro (15-inch, 2018)
• MacBook Pro (13-inch, 2018, Four Thunderbolt 3 ports)
• MacBook Pro (15-inch, 2017)
• MacBook Pro (13-inch, 2017, Four Thunderbolt 3 ports)
• MacBook Pro (13-inch, 2017, Two Thunderbolt 3 ports)
• MacBook Pro (15-inch, 2016)

• MacBook Pro (13-inch, 2016, Four Thunderbolt 3 ports)
• MacBook Pro (13-inch, 2016, Two Thunderbolt 3 ports)
• MacBook Pro (Retina, 15-inch, Mid 2015)
• MacBook Pro (Retina, 15-inch, Mid 2015)
• MacBook Pro (Retina, 13-inch, Early 2015)
• MacBook Pro (Retina, 15-inch, Mid 2014)
• MacBook Pro (Retina, 13-inch, Mid 2014)
• MacBook Pro (Retina, 15-inch, Late 2013)
• MacBook Pro (Retina, 15-inch, Early 2013)
• MacBook Pro (Retina, 13-inch, Late 2013)
• MacBook Pro (Retina, 13-inch, Early 2013)
• MacBook Pro (Retina, 15-inch, Mid 2012)
• MacBook Pro (15-inch, Mid 2012)
• MacBook Pro (Retina, 13-inch, Late 2012)
• MacBook Pro (13-inch, Mid 2012)

MacBook Air

Mac Mini Late 2009 Upgrade To Catalina

• MacBook Air (Retina, 13-inch, 2020)
• MacBook Air (Retina, 13-inch, 2019)
• MacBook Air (Retina, 13-inch, 2018)
• MacBook Air (13-inch, 2017)
• MacBook Air (13-inch, Early 2015)
• MacBook Air (11-inch, Early 2015)

• MacBook Air (13-inch, Early 2014)
• MacBook Air (11-inch, Early 2014)
• MacBook Air (13-inch, Mid 2013)
• MacBook Air (11-inch, Mid 2013)
• MacBook Air (13-inch, Mid 2012)
• MacBook Air (11-inch, Mid 2012)

MacBook

• MacBook (Retina, 12-inch, 2017)
• MacBook (Retina, 12-inch, Early 2016)

Imac 2009 Upgrade To Catalina Update

iMac Pro

iMac

• iMac (Retina 5K, 27-inch, 2020)
• iMac (Retina 5K, 27-inch, 2019)
• iMac (Retina 4K, 21.5-inch, 2019)
• iMac (Retina 5K, 27-inch, 2017)
• iMac (Retina 4K, 21.5-inch, 2017)
• iMac (21.5-inch, 2017)
• iMac (Retina 5K, 27-inch, Late 2015)
• iMac (Retina 4K, 21.5-inch, Late 2015)
• iMac (21.5-inch, Late 2015)

• iMac (Retina 5K, 27-inch, Mid 2015)
• iMac (Retina 5K, 27-inch, Late 2014)
• iMac (21.5-inch, Mid 2014)
• iMac (27-inch, Late 2013)
• iMac (21.5-inch, Late 2013)
• iMac (27-inch, Late 2012)
• iMac (21.5-inch, Late 2012)

Imac 2009 Upgrade To Catalina Download

Mac mini

Imac 2009 Upgrade To Catalina Free

Mac Pro