Resizing partitions for dual booting two macos

[maccoops]

Trying to follow the advice for upgrading macos: dual booting a "production" environment and a "test" environment, but struggling to increase my test environment partition.

Both partitions are working and both are currently on Sonoma, the dual boot works great. I tried to upgrade my test environment to Sequoia but I get an error that I don't have enough space, I need another 5GB.

WHen I reduce the size of my production partition, disk utility is creating a new blank partition equal to the reduction in size of the prod partition. This means I cannot increase the size of my test partition as there is no free space for the test partition to grow into, it is occupied by the new unwanted partition. I'm stuck in a loop, if I remove the unwanted partition, my prod partition automatically grows back!

Hope my question is clear.

 

[kitKAC]

You should have added a new APFS Volume instead of using partitions, volumes grow and shrink dynamically depending on need. I'd delete the 2nd partition and start again.

 

[Mike Boreham]

Trying to follow the advice for upgrading macos: dual booting a "production" environment and a "test" environment, but struggling to increase my test environment partition.

Both partitions are working and both are currently on Sonoma, the dual boot works great. I tried to upgrade my test environment to Sequoia but I get an error that I don't have enough space, I need another 5GB.

WHen I reduce the size of my production partition, disk utility is creating a new blank partition equal to the reduction in size of the prod partition. This means I cannot increase the size of my test partition as there is no free space for the test partition to grow into, it is occupied by the new unwanted partition. I'm stuck in a loop, if I remove the unwanted partition, my prod partition automatically grows back!

Hope my question is clear.

What @kitKAC says. Apple details the process in this article: ”Use more than one version of macOS on Mac”

 

[maccoops]

Thanks guys. I think the issue is that I had set up a quota (max size) on the new volume I added for my test environment. Trying to be too clever... Deleted and starting again without any quota...

 

[maccoops]

Yes, success. All working after I deleted the previous test volume/partition and created a new one without any quota or reserve. Thank you.