Partition or New volume

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Partition or New volume

Hi, I am running Mojave 10.14.6. As a result of apple's lack of support, I now have increasing problems so am looking for solutions.

Several older apps I have use for years and rely on will no longer work beyond 10.14 and I am increasingly being forced to upgrade if i want to use newer apps and libraries etc.

To get around this issue and still use my beloved apps I thought i would create a new volume and install Monterey on it. However when running the Monterey installation app I get the message - "Mac OS 12 cannot be installed on this computer". - Now in my research I read that to install Monterey I need a format of APFS OSX ( Extended Journaled ) but when i try to add a new volume to my HD the only options available in disk utility are variations of APFS. Does this mean I will have to create a partition ( which does have OSX ( Extended Journaled ) options, instead on a volume. ( which dosen't)

I was hoping not to have to do this because switching between partitions will mean a restart every time I need to change OS Systems and I have an ongoing problem whereby my Mac takes 20minutes to start up if I ever have to do a restart. - Not sure if swapping between volumes would also demand a re-start but i was thinking it may not.

Any advice would be appreciated. Regards- BRIAN.

iMac 27″ 5K

Posted on Jun 4, 2024 2:56 AM

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Answer 1

Top-ranking reply

Luis Sequeira1

Level 9

74,106 points

Jun 4, 2024 5:13 AM in response to Artiquarius

First, you need to tell us which version of iMac you have.

It appears that it may be too old to run Monterey, but without more information we can't know for sure.

Go to Apple menu and choose About this Mac. What does it say - for example "iMac (27 inch, late 2015)" or something - do tell us.

Second, you need an APFS volume for Monterey, NOT Mac OS Extended.

If it turns out that your Mac can run Monterey, we can proceed with how to do it properly.

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Answer 2

Owl-53

Level 10

104,203 points

Jun 4, 2024 4:11 AM in response to Artiquarius

Exactly what version of Mojave is installed.

At some point in the life of Mojave macOS 10.14.

Was the Drive Converted from the Older HFS Journaled / GUID format to the newer APFS / GUID format required for all newer versions of macOS ?

Use more than one version of macOS on Mac

Excerpt from above

On your built-in startup disk

If you want to install the new macOS on your built-in startup disk, create a new APFS volume to contain it.

Make sure that your Mac is using macOS High Sierra or l ater. Earlier versions of macOS aren't compatible with APFS.
Open Disk Utility, which is in the Utilities folder of your Applications folder.
In the sidebar, select your existing APFS volume, such as Macintosh HD.
Choose Edit > Add APFS Volume from the menu bar, or click the add volume button (+) in the Disk Utility toolbar. These options are available only when an APFS-formatted volume is selected.
Type any name for the new volume, then click Add.
When done, quit Disk Utility.

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Partition or New volume

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