www.makemkv.com

On the LG:

002003:0000 Error 'OS error - (ipc/send) invalid destination port' occurred while reading '/BDMV/STREAM/00372.m2ts' at offset '4367843328'

This error is normally seen on a USB-connected and powered drive, when it starts spinning too fast (read rate too high) for the available USB ...

This is VERY weird. This error is consistent with a USB-connected drive being driven to a speed that exceeds its available power supply, but your drive is an internal, according to its model number:

Error 'OS error - (ipc/send) invalid destination port' occurred while reading '/BDMV/STREAM/00042 ...

I believe I have this error tracked down to El Capitan. I've been having massive issues using MakeMKV and Handbrake since upgrading.
The discs have a tendency to self eject off of the desktop, yielding an error each time.

Will update if I get through this latest rip successfully.

EDIT: DID NOT ...

MakeMKV v1.9.7 darwin(x86-release) started
Optical drive "BD-RE PIONEER BD-RW BDR-TD03 1.01d" opened in OS access mode.
Using direct disc access mode
Loaded content hash table, will verify integrity of M2TS files.
Title #00053.mpls has length of 50 seconds which is less than minimum title length of ...