The optical drive of a "late 2007" MacBook broke recently. I'm starting to think that it's not possible to install Linux on this machine via an USB device. I've installed Ubuntu (still running) on one of the partitions before. The optical drive was working back then.
To no avail, I've tried all combinations of the following that I can think of:
I also tried this a couple of times without success: How to install on a MacBook Air 3,2 without an external CD drive?
If an USB install is not possible, are there other possibilites?
Thanks in advance.