Installing IOS 12 on a external hard drive

[adrian.k]

Hey!
I bought a new iMac 21" in January this year, but im having a few issues with it. I think its too slow, and usually choose to use my MacBook from 2014, because of the time it takes to start small programs such as Images.

When I bought my iMac, I ordered it with 1TB Hard drive. Now I see that I should have chosen the 250 SSD drive, because of how slow my iMac is (it takes for example 3 minutes from I start it until images is open).

I have been advised to buy an external hard drive (SSD), and I have bought one now that has the storage of 250gig. I want to install IOS 12 on this one, because I have heard that it will go faster because its an SSD.

However, when I try to reinstall IOS12, I am able to choose what hard drive I want to install it on. When I choose my new ssd disk (Samsung portable SSD T5), I get this message: Use Disk utility to use disk utility to change the "". Select the device with the disk, click on the delete button, select a volume layout, and then click the delete.

How do I reinstall it to my new ssd hard drive?

Sorry for bad english, please feel free to ask for more information if something is missing or bad explained.

 

[one more]

Greetings!

Try posting the same thing in MacOS Forum here:

https://forums.macrumors.com/forums/macos.69/

This one is dedicated to iOS 12, which is a new iPhone/iPad system to be released soon.

 

[adrian.k]

Greetings!

Try posting the same thing in MacOS Forum here:

https://forums.macrumors.com/forums/macos.69/

This one is dedicated to iOS 12, which is a new iPhone/iPad system to be released soon.

Thanks mate, I will try

 

[Julien]

iOS 12 on a Mac HD?????? Confused???? Is the OP confusing iOS with macOS?

 

[adrian.k]

Thanks mate, I will try

Yeah, im sorry, haha.. I meant macOS