5 ms·

Aren’t all of them based on Linux, which itself is based off UNIX? So while they’re more detached, they’re still UNIX under the hood.

flenserboy 3y ago
iOS & iPadOS are Mac(NeXT)-derived, thus are UNIX under the hood.
- deleted 3y ago
  [deleted]
- mtillman 3y ago
  Unix like and only mildly for iOS.
  - heyoni 3y ago
    Where is this mild part coming from?
    - pjmlp 3y ago
      http://newosxbook.com/home.html http://newosxbook.com/home.html https://www.amazon.com/Mac-OS-iOS-Internals-Programmer/dp/1118057651 https://www.amazon.com/Mac-OS-iOS-Internals-Programmer/dp/11... Basically the C, C++ and Objective-C stuff, nowadays Swift as well, completly unrelated to UNIX.
      - KerrAvon 3y ago
        Could you elaborate a little? I don’t understand why the libraries make macOS less UNIX than some other Unixlike.
        pjmlp 3y ago
        Who mentioned macOS?!? My original statement was, > Android, ChromeOS, iOS and iPad OS have very little correlation to UNIX userspace, if any at all. Those books show how iOS and iPad OS have very little UNIX across the whole stack, and how much was taken from OS X.
  - tymscar 3y ago
    Not just Unix like. For example macOS is fully unix certified: https://www.opengroup.org/openbrand/register/brand3683.htm https://www.opengroup.org/openbrand/register/brand3683.htm
    - mtillman 3y ago
      It says iOS not macOS and now I’m getting downvoted for reading. Brilliant. MacOS is fully certified allowing for all that sweet government contract money.
pjmlp 3y ago
It hardly matters when userspace doesn't expose any POSIX layer, beyond ISO C and ISO C++ standard library. Apple stuff is unrelated to Linux.
butterisgood 3y ago
None of Apple’s operating systems are based on Linux. iOS, MacOS, TVOS, and WatchOS are all based on XNU/Darwin, which is in the BSD lineage (predates Linux), but also incorporates the Mach Microkernel (though the OS is not a microkernel style system)
- rbanffy 3y ago
  > None of Apple’s operating systems are based on Linux Not now, but before Apple was sold to NeXT for a Steve Jobs minus $400 million, there was MkLinux. It was an interesting way to run Linux on beige PowerMacs and many places I've worked with gladly adopted it giving new life to abandoned Macs as X terminals and lightweight workstations. Oddly enough, it has a newer Mach kernel than NeXT's OS.

flenserboy 3y ago

iOS & iPadOS are Mac(NeXT)-derived, thus are UNIX under the hood.

deleted 3y ago
[deleted]
mtillman 3y ago
Unix like and only mildly for iOS.
- heyoni 3y ago
  Where is this mild part coming from?
  - pjmlp 3y ago
    http://newosxbook.com/home.html http://newosxbook.com/home.html https://www.amazon.com/Mac-OS-iOS-Internals-Programmer/dp/1118057651 https://www.amazon.com/Mac-OS-iOS-Internals-Programmer/dp/11... Basically the C, C++ and Objective-C stuff, nowadays Swift as well, completly unrelated to UNIX.
    - KerrAvon 3y ago
      Could you elaborate a little? I don’t understand why the libraries make macOS less UNIX than some other Unixlike.
      - pjmlp 3y ago
        Who mentioned macOS?!? My original statement was, > Android, ChromeOS, iOS and iPad OS have very little correlation to UNIX userspace, if any at all. Those books show how iOS and iPad OS have very little UNIX across the whole stack, and how much was taken from OS X.
- tymscar 3y ago
  Not just Unix like. For example macOS is fully unix certified: https://www.opengroup.org/openbrand/register/brand3683.htm https://www.opengroup.org/openbrand/register/brand3683.htm
  - mtillman 3y ago
    It says iOS not macOS and now I’m getting downvoted for reading. Brilliant. MacOS is fully certified allowing for all that sweet government contract money.

pjmlp 3y ago

It hardly matters when userspace doesn't expose any POSIX layer, beyond ISO C and ISO C++ standard library. Apple stuff is unrelated to Linux.

butterisgood 3y ago

None of Apple’s operating systems are based on Linux. iOS, MacOS, TVOS, and WatchOS are all based on XNU/Darwin, which is in the BSD lineage (predates Linux), but also incorporates the Mach Microkernel (though the OS is not a microkernel style system)

rbanffy 3y ago
> None of Apple’s operating systems are based on Linux Not now, but before Apple was sold to NeXT for a Steve Jobs minus $400 million, there was MkLinux. It was an interesting way to run Linux on beige PowerMacs and many places I've worked with gladly adopted it giving new life to abandoned Macs as X terminals and lightweight workstations. Oddly enough, it has a newer Mach kernel than NeXT's OS.