This is only to let you know that someone is reading your post. Unfortunately, I can't help. I know next to nothing about Mac systems and you're way ahead of me with all that re-building stuff.
As I use an android device for reading comics, much more comfortable than reading on a desktop or laptop, I have to leave it to others to add their tuppence worth.
To be a bit clearer, I download comic filesto my desktop, then transfer them to micro sd cards, that way , I simply insert a card with piles of comics into my Samsung tablet and read away, replacing it with another when I fancy a change. It's all very easy with android.
Hooe some of the others will be able to help.