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> I'm surprised immutable systems aren't more popular. Well technically near every router and embedded device is "immutable", with usually only config partitio

by ilyt 4y ago

> I'm surprised immutable systems aren't more popular. Well technically near every router and embedded device is "immutable", with usually only config partition being changed, and firmware update being just re-loading whole image.

fragmede 4y ago
If that counts then maybe macOS should as well, which has a read only root filesystem with an overlay on top these days.
- arjvik 4y ago
  Can you elaborate on how this works? This is the first I'm hearing of it.
  - 0x457 4y ago
    Core of macos itself is immutable and won't let you even add kernel modules or enable/disable system services, and IIRC it lives on a separate partition that is R/O.
  - joshspankit 4y ago
    This is the feature called System Integrity Protection (SIP)
  - lproven 4y ago
    It has used an increasingly complex disk layout which has evolved through the last few major releases. Here is an overview of macOS 13's layout. https://eclecticlight.co/2022/10/25/ventura-volume-layout/ https://eclecticlight.co/2022/10/25/ventura-volume-layout/