Quote:
For the update to work, do I actually need to "install" BIAB on my second hard drive ...


Normally, the answer is, Yes.

You found another way by cloning your HDD to another volume and renaming it..


BIAB 2026 Audiophile Mac
24Core/60CoreGPU M2 MacStudioUltra/8TB/192GB Sequoia/Tahoe, M1 & M5 MBAir, 2012 MBP
Digital Performer11, Logic, Finale27/Dorico/Encore/SmartScore/Notion/Overture