How can you tell whether your Mac’s shiny new Sealed System Volume is properly sealed? You could easily be misled into thinking it isn’t.
SSV
It’s got to be better than Catalina, so why not upgrade when it first comes out? Here are some suggestions to help you make your decision.
A complete guide to the structure and layout of APFS startup disks from High Sierra to Big Sur (Intel), together with tear-out PDF charts.
Looking at what’s involved in updating Big Sur’s new Sealed System Volume shows what’s necessary for successful cloning.
The Eclectic Light Company 