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Use dd to copy the ISO to the whole disk (e.g /dev/sdz, where sdz is
whatever device the USB device shows up as) not a partition (e.g.
/dev/sdz1). The ISO image already has a partition table on it which
points to two partitions. One of them is a FAT32 EFI partition that
the Mac needs to see to boot. (Yes, it is also a valid ISO9660
filesystem. This is some magic that uses the empty spaces in the
various formats to make one image file that is valid as multiple
formats at the same time).<br>
<br>
Same thing applies for UEFI PC machines. They will need to see the
FAT32 EFI partitions to boot.<br>
<br>
I'm not sure if the image is signed for secure boot or not, but that
also requires seeing the EFI partition (and that the files on the
EFI partition are signed appropriately).<br>
<br>
<br>
<div class="moz-cite-prefix">On 2/16/22 16:30, Jochen Albrecht
wrote:<br>
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<div>Let me start with the positive news: I distributed a 32 GB
flash drive to my 20 students and a good number of them could
happily boot from the NTFS-formatted flash drive and proceed.
It all works well on the eight-years old Dell computers in our
labs.</div>
<div><br>
</div>
<div>But I have not succeeded to help any of my Macintosh
students and ran into significant troubles with Lenovo and HP
laptops.</div>
<div><br>
</div>
<div>On the Mac side, I concluded that I needed to format the
OSGeo-live partition to HFS+. I then proceeded to use the
Linux 'dd' command to copy the iso file to the first
partition, which resulted in the partition format to switch to
"ISO9660". The resulting flash drive is still not detected on
a variety of Macs</div>
<div>
<ul>
<li>Macbook Air (retina 13” 2019) , Intel(R) Core(TM)
i5-8210Y CPU @ 1.60GHz, Mac OS Big Sur version 11.6.</li>
<li>MacBook Pro, 13-inch, 2020, four thunderbolt 3 ports;
CPU: 2 GHz Quad-Core Intel Core i5</li>
</ul>
</div>
<div>Lenovo ThinkPads and IdeaPads apparently cannot read boot
drives that are NTFS formatted but once I go back to FAT32,
they boot properly. Having said that, the Lubuntu system does
not recognize the built-in network cards and hence fails to
connect both via ethernet cable or wireless.</div>
<div><br>
</div>
<div>HP laptops work only if "secure boot" is disabled in the
BIOS and "legacy support" enabled. Unfortunately, newer HP
laptops don't seem to have the legacy boot option anymore and
so we are here stuck again with the flash drive being
invisible to my students.</div>
<div><br>
</div>
<div>The last time I taught my Advanced GIS course with
OSGeo-live flash drives was in 2019 and back then I did not
encounter any of the above problems. </div>
<div><br>
</div>
<div>So, after all this preambulation, here are my questions:</div>
<div>
<ol>
<li>What do I need to do the get my Mac students set up (I
do not have a Mac and therefore need more hand
holding here)</li>
<li>Is there a website (I searched the listserv archives to
no avail) that collects FAQs about installation problems?</li>
<li>Assuming that there is not, are there readers of this
message who have successfully circumvented the problems
described with newer laptops?</li>
</ol>
I could be wrong but I believe that a bit of this is due to
the distribution being Lubuntu based, which has a much small
community that may not be as up-to-date with modern BIOS as
other, larger Linux distributions. Given that we are beyond
the days of DVDs, might we perhaps return to one of the
heavyweights (Ubuntu, Fedora, Debian)?</div>
<div>And a second suggestion: could the organizers of this
listserv create a FAQ related to installation issues? The
support in that respect is small and outdated. I would be
happy to populate it with what I have learned so far.</div>
<div><br>
</div>
<div>Cheers,</div>
<div> Jochen</div>
</div>
<br>
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