For some exams, I must deploy a exact setup: MacOS 10.15.4 with Xcode 12.3. My MacMini 2018/2020 is operating 10.15.5 with VirtualBox 6.1.12. I’ve a operating VM with 10.15.0 which I snapshot after set up. My plan was to then do a handbook improve to 10.15.4 because of the corresponding combo replace, as I don’t need to leap to the newest Catalina model.
The method of the handbook replace is to mount the dmg file, which then exhibits the pkg file that begins the improve course of when run, and asks to reboot sooner or later to finalize all the pieces.
The reboot would not take me to the improve course of, however again to the 10.15.0.
There are various weblog posts and guides relating to what to do while you undergo the extra classical path of getting an replace be downloaded to /Functions/Set up macOS xxx.app.
My guess is that sooner or later, each methods of upgrading observe the identical course of (eg reboot to some sort of “improve partition” that may overwrite the OS information, reboot to upgraded OS). I would love clarifications on the components the place these improve paths differ, in order that I can troubleshoot what’s stopping me from reaching 10.15.4.
Previously, I did related issues with 10.14 and my notes on the subject do not present such a difficulty (somewhat points with lack of APFS assist in VirtualBox at the moment). Particularly, I feel the partition format has modified since then.
Basically, what I attempted thus far:
- begin handbook improve course of via the
.pkg, reboot - interrupt boot by hammering
Esc, attain some sort of gray and blue boot supervisor (is that VBox or Apple stuff? this isn’t the VBox EFI shell, there’s a text-based UI menu with “Machine Supervisor”/”Boot Supervisor”/”Boot Upkeep Supervisor”) - discover partitions, searching for an EFI boot file (I noticed the restoration one, cannot discover the “common” one nor the “improve” one)
- boot
For instance, I’m wondering if the pkg is partially extracted and that I’m speculated to discover a boot.efi someplace on the “System Information” partition. In that case, the place ought to I search for it? Do I’ve a extra “sysadmin” approach of deploying this improve, particularly with out reboot?