How to Upgrade OS X 10.9 to 10.11?

macos tips
1

I have a MacBook Air running macOS 10.9.5, but the software I want to use requires version 10.11.x. The only installer I can find is for 10.11.1, which won’t work because it requires 10.11.0 to be installed first. Does anyone have a link to the 10.11.0 installer? Thanks!

2

Hello, glad to help you.

To upgrade from OS X 10.9 to 10.11, follow these simple steps:

  1. Back up your data using Time Machine.
  2. Download OS X El Capitan from Apple’s official support page.
  3. Once downloaded, run the installer from your Applications folder and follow the on-screen instructions.

Your Mac will automatically restart, and OS X 10.11 will be installed.

3

Hey, the link is here. Maybe you can use it as a reference: Download OS X EI Capitan 10.11.6

4

If you cannot install it with this link, it’s more difficult you should reinstall macOS.
Be careful to backup all the data before reinstalling.

5

Haha, it’s easy if you follow the steps here.
There are full installers of OS X 10.11:
Download OS X 10.11 El Capitan DMG & ISO Full Installer [Direct Link]
Hope your software can work at last.