Origin 10.7.5

A 2011 Mac Book can upgrade to High Sierra.

Refer to the Getting Started page for Installation instructions. See the release notes. Windows Installer. Windows ZIP file for non admin install. Mac OS X 10.8 Mountain Lion or newer. Mac OS X is the modern operating system that powers every Macintosh computer, from the Mac mini to the iMac Pro. It was introduced by Steve Jobs in 2000.

And yes you need to install Mac OS X El Capitan before you upgrade to High Sierra.

What method are you using to install El Capitan, that error usually appears if you are trying

to reinstall from Apples Recovery Servers. If so why are you doing that, bad move.


This is how to install Mac OS X El Capitan.


Click on the link below,

Go to Download OS and click on OS X El Capitan 10.11

this downloads InstallMacOSX.dmg to your Downloads folder.


The next section can only be done on a mac that is capable of running El Capitan.

This includes macs that have the potential to run El Capitan but have been upgraded to a newer OS.

A mac that came preinstalled with an OS later than El Capitan will refuse to do the next bit.


When downloaded open to InstallMacOSX.pkg, double-click on

that and an installation window will open, this does not install El Capitan

but converts the InstallMacOSX.pkg to the Install OS X El Capitan.app which

you will find in your Applications folder, it should be 6.2GBs in size.


(If the installation window asks which disk you want to install to, you must pick

the disk that you are booted to at the time. Not any internal or external disk that

you want to eventually install El Capitan on, that is for later.)


To start the installation of El Capitan double click on the Install OS X El Capitan.app.


The copy of the install app self deletes after installing El Capitan, so make sure you keep a copy of the

InstallMacOSX.dmg if you need it in future, or you could just make a copy of the Install OS X El Capitan.app

prior to installing and moving it to an external drive for safe keeping.

Origin 10.5.57

It is also possible to create a bootable USB installer disk using the Install OS X El Capitan.app in the Applications

Origin

folder and the createinstallmedia command in the Terminal app.


Read the instructions here,


After upgrading to El Capitan you can now upgrade to macOS High Sierra,

Origin for mac 10.7.5


Origin 10.5.57

Open Safari and click on this link,

Go to Check Compatibility to see if your mac qualifies for the OS upgrade you want.

Then go to the Download OS section and click on the OS you want to install.


Before upgrading make a full back up of your Mac.


Check that third party apps you use have updates available for the new OS.

Origin For Mac Os 10.7.5

Check that your printers/ scanners etc have updated drivers and software available for the new OS.


Origin For Mac 10.7.5

Connect your mac to your router via cable rather than rely on WiFi.

Do not use your mac while it is downloading

10.7.5

and do not use any other devices that share the same internet connection.


If the App Store says ‘Open’ then it is detecting a previous download of the install app

go to the Applications folder locate Install macOS High Sierra.app.

Move it to the Trash, empty the Trash.

Restart, click on the link again, the App Store should say ‘Get' or 'Download'.


Jul 31, 2021 10:04 PM