[Bug 1967753] [NEW] Ubuntu Jammy Desktop ISO installer fails to find live filesystem on Mac Pro 2012 (Mac 5, 1 Westmere)

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I used a USB stick tool called Mac Linux USB loader to create a bootable
USB stick so that I could install Ubuntu Jammy Desktop on my Mac Pro 5,1
Westmere (circa 2012). I was able to do the same installation and
install Ubuntu Focal Desktop on my Mac Pro without issues, but the
Ubuntu Jammy ISO would not get to the main installer. After getting past
the GRUB menu and the Ubuntu splash screen, it fails with a screen full
of messages saying:

/init: line 49: can't open /dev/sr0: No medium found

After this stream of messages, it asks to attempt interactive netboot:

Unable to find a medium containing a live file system
Attempt interactive netboot from a URL?
yes no (default yes):
Two methods available for IP configuration:
  * static: for static IP configuration
  * dhcp: for automatic IP configuration
static dhcp (default: dhcp):
[Asks for vlan ID and ISO URL, etc. ...]
[Connects to cdimage.ubuntu.com and starts downloading jammy-live-server-amd64.iso ...]
[Download completes ...]
Unable to find a medium containing a live file system

BusyBox v1.30.1 (Ubuntu 1:1.30.1-7ubuntu3) built-in shell (ash)
Enter 'help for a list of built-in commands.

(initramfs) ls /dev/sd*
/dev/sdb1 /dev/sdb /dev/sda2 /dev/sda1 /dev/sda
(initramfs) cat /proc/version_signature
Ubuntu 5.15.0-23.23-generic 5.15.27

** Affects: ubiquity (Ubuntu)
     Importance: Undecided
         Status: New


** Tags: bot-comment installer jammy
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Ubuntu Jammy Desktop ISO installer fails to find live filesystem on Mac Pro 2012 (Mac 5,1 Westmere)
https://bugs.launchpad.net/bugs/1967753
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