4 ms·

The "disk" is chips soldered to the motherboard.

• lisper 3y ago
  One of the disks is. Not all of them are. There is this wonderful technology called "external storage". But even if the backup has to be stored on the on-board SSD for some reason, so what? It's temporary. That storage can be reclaimed when it's needed. MacOS is already using on-board SSD behind the scenes for Time Machine backups when you don't have an external drive attached. I see absolutely no reason why it could not do the same for a rollback image. The real reason you can't roll back is simply that Apple doesn't want to allow it, because that would make it easier for the market to reject one of their updates.
  • mcpackieh 3y ago
    > The real reason you can't roll back is simply that Apple doesn't want to allow it, because that would make it easier for the market to reject one of their updates. Bingo. OpenSUSE makes it easy using BTRFS snapshots, enabled by default. Apple and Microsoft could make it easy too but empowering users like this isn't in their interest.
  • postmodest 3y ago
    > The real reason you can't roll back is simply that Apple doesn't want to allow it, because that would make it easier for the market to reject one of their updates. Right. That's why your Time Machine backups stop worki--oh wait, their integrated backup software lets you restore your disk to the state before the update. So your narrative is FUD.
    • lisper 3y ago
      No, it isn't. What you say is true in theory but it doesn't actually work in practice because major upgrades come with non-backwards-compatible firmware changes. Try installing Mavericks on a machine that has been upgraded to Yosemite or later. (It also puts the burden on the user to actually make a backup before upgrading.)
      • hulitu 3y ago
        Wow. Imagine having to update your linux/bsd kernel after a bios update.