El Capitan Combo Update

Mac OS X users can install OS X El Capitan 10.11.1 with Bootable USB or DVD using iTunes for Free. Just Download OS X 10.11.1 El Capitan Setup / Combo Update.DMG Files via Direct Links. Click Here for official Apple guidelines. Download OS X El Capitan 10.11.1 Combo Update (15B42).
I've installed Snow Leopard and in order to install Sierra, or Hi Sierra, I need to install El Capitan first. I've tried installing 10.11.6 El Capitan Combo Update from the Apple store, but I get the message that I need El Capitan 10.11 installed first before I can install the update 10.11.6. I cannot find El Capitan 10.11 anywhere to download.

El Capitan Camping
El Capitan 10.11.6 Os
El Capitan Combo Update 10.11.6

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.

One of my Macs wouldn't Restart, clicked on Restart and also waited it out with the counter timer and still it wouldn't restart to complete installation of update. I downloaded OS X El Capitan 10.11.6 Combo Update, but can't find the sha1 What's the sha1 checksum for OS X El Capitan 10.11.6 Combo Update? Doesn't Apple usually list it?

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.

El Capitan Camping

El Capitan 10.11.6 Os

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.