Apple Event: May 7th at 7 am PT
Hi,
I have High Sierra installed on my mac and have had problem all year with some software that isn't compatible and have thought about installing an older version of OS on a second partition.
I have partitioned a portion of the hard disk and a separate external drive but the disks don't show as bootable and even when I go to install the older OS am being advised the system is too old and cant install - any help suggestions or thoughts?
Thanks
iMac, Macbook Pro
Make a bootable installer, and install that OS on the partition.
You should be able to select the partition when you run the install.
How to create a bootable installer for macOS - Apple Support
Just change the name of your usb stick to "MyVolume" and copy/paste the command for the appropriate OS (from the article). The name of the usb stick will be changed, so it doesn't matter what you name it. Using MyVolume means you don't have to change the command at all.
I assume you already have the Installer downloaded and it is still in the Applications folder.
Make a bootable installer, and install that OS on the partition.
You should be able to select the partition when you run the install.
How to create a bootable installer for macOS - Apple Support
Just change the name of your usb stick to "MyVolume" and copy/paste the command for the appropriate OS (from the article). The name of the usb stick will be changed, so it doesn't matter what you name it. Using MyVolume means you don't have to change the command at all.
I assume you already have the Installer downloaded and it is still in the Applications folder.
It will not be bootable until you install something on the partition.
R
Many thanks had really got a bit lost with this and not even thought of the need to install - did it this morning and really easy.
Again thanks for the help really appreciated.
Dual boot with older OS
