Installing MacOS on a new HDD - External USB drive VS Internet recovery

Dominic
Dominic used Ask the Experts™
on
Hi - I am about to replace the HDD of a client Macbook mid 2012 with an SSD drive after the former had failed.
Is there a way that i can install High Sierra or Sierra on the new drive straight from an external USB disk instead of going through the Internet recovery?
Otherwise it means it will install Mountain Lion and then i have to re-upgrade again which is a waste of time i would like to avoid if poss.


Thanks
D
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Jackie Man IT Manager
Top Expert 2010

Commented:
Do you have access to another working Apple computer running High Sierra?
DominicIT Consultant

Author

Commented:
Hi Jackie Man - Yes i do - my own Mac mini i use for testing is running it
bbaoIT Consultant

Commented:
here you go. this is the official link to download a genuine copy of HS from Apple using App Store app on Mac. tested.

https://itunes.apple.com/us/app/macos-high-sierra/id1246284741?mt=12
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DominicIT Consultant

Author

Commented:
HI BBAO- i cant view this - i am based in Europe and this goes to the US store which i cant view
bbaoIT Consultant

Commented:
i guess you can change the country. i am accessing the Australian store, it works as well.
DominicIT Consultant

Author

Commented:
In this case it doesnt work, it says its not available ;??
I know how to get to download the macOS from the Itunes store - thats not my issue. I wanted to know whether i can install it onto a virgin drive via an external drive onto a macbook pro 2012 or do i have to go through the whole Internet recovery sequence....
IT Manager
Top Expert 2010
Commented:
You need to put the new SSD into the macbook first. Then, start your macbook with the USB installer for OS X to install the OS to the SSD.

https://www.macworld.com/article/3204672/macs/how-to-create-a-bootable-macos-high-sierra-installer-drive.html
bbaoIT Consultant

Commented:
once you have downloaded the installer file (named Install macOS High Sierra.app), please follow below official guide to convert the installer into a bootable USB drive. then boot your Mac using the external drive to install the OS offline (without Internet).

https://support.apple.com/sl-si/HT201372
DominicIT Consultant

Author

Commented:
Thanks Chaps - those solutions worked

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