On MacBookPro, Mid-2012 13″, A1278 particulars https://everymac.com/programs/apple/macbook_pro/specs/macbook-pro-core-i5-2.5-13-mid-2012-unibody-usb3-specs.html
Most important SSD(upgraded from HDD few years earlier than) is OSX 10.15.7.
I’ve changed Optical drive with 2TB SSD (https://www.ifixit.com/Information/Putting in+MacBook+Professional+13-Inch+Unibody+Mid+2012+Twin+Onerous+Drive/13787).
Put in kubuntu-22.04.5-desktop-amd64.iso on second ssd.
Reboot macbookpro
maintain alt/possibility key, choose EFI Boot boot, first in line, after that’s authentic OSX disk
get display screen “GNU GRUB model 2.06” with choices
Ubuntu
Superior choices for Ubuntu
choose “Ubuntu”
black display screen, after that
error: failure studying sector 0xd4dbc0 from hd7.
error: you'll want to load the kernel first.
Press any key to proceed...
it goes routinely (even when I don’t press any key) to “GNU GRUB model 2.06”
In “Superior choices for Ubuntu” I’ve:
Ubuntu, with Linux 6.8.0-45-generic
Ubuntu, with Linux 6.8.0-45-generic (restoration mode)
Ubuntu, with Linux 6.8.0-40-generic
Ubuntu, with Linux 6.8.0-40-generic (restoration mode)
Each selection is identical textual content , besides 0x totally different
Loading Linux 6.8.0-40-generic ... (few second or as much as 2-3 minutes on it)
error: failure studying sector 0x14baa00 from hd7.
Loading preliminary ramdisk ...
error: you'll want to load the kernel first.
Press any key to proceed...
This particular person did every little thing as me and it’s working advantageous, however not for me:
https://www.reddit.com/r/mac/feedback/az2nrn/linux_dual_boot_on_2012_macbook_pro/
right here is one other opinion what to strive:
The issue comes from Apple has restricted booting every other OS on a Mac laptop that got here with a inbuilt DVD drive from solely that DVD drive. An OS X installer may be booted from a USB port, from the USB thumb drive or DVD drive linked to a USB port however you’ll be able to’t boot Home windows or Linux from the USB port.
So the one strategy to set up Ubuntu, or every other OS than OS X. is to reinstalled the DVD drive and put the drive you need the opposite OS on in the primary drive bay. As soon as it’s put in you’ll be able to transfer the drive to the optical bay.
https://discussions.apple.com/thread/5992651?sortBy=rank
Whether it is potential to twin booting one OS (the place second is Luks encrypted Linux ) on every of the SSD drives ?
