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How do I install Ubuntu alongside Mac OS Catalina?

I installed rEFInd and created a bootable Ubuntu 22 v running.

But when I choose Installation Type, I do not get the option to "Install Ubuntu alongside MAC OSX", but only "Install Ubuntu (Will erase data on partition...)"

I created the bootable USB stick with etcher.

Have I missed something? What should I do?

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  • Which model of Mac are you trying to install Ubuntu onto? Is your Mac partition encrypted?
    – matigo
    Jan 20, 2023 at 21:51
  • Ubuntu 22? Don't forget 22 & 22.04 are different systems, Ubuntu Core 22 being a flavor of Ubuntu 22.04 LTS Server intended for headless cloud or IoT use. You don't normally install a headless server system in dualboot, it's normally used with desktop systems & whilst Desktop is available for 22.04 & 22.10 - it's not available for 22.
    – guiverc
    Jan 20, 2023 at 22:25

1 Answer 1

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I haven't checked in a while, but the last time I did, Ubuntu didn't offer very flexible options for resizing macOS partitions at install time. Thus, you may need to use macOS utilities to shrink the macOS partition before booting the Ubuntu installer, or provide a blank disk for the Ubuntu installation. Even then, you may need to use the "Something Else" option to manually create partition(s) for Ubuntu.

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