[Info-vax] The best VMS features, was: Re: openvms renaming file

[Arne Vajhøj]

On 5/30/2018 10:40 AM, Bill Gunshannon wrote:
> On 05/30/2018 09:14 AM, Jon Schneider wrote:
>> (The BSD's fall into
>> this category as well but they abdicated any serious position in
>> the IT business world ages ago.  And look what it got them!)
>>
>> Only all of Netflix's streaming thus most internet traffic in the U.S. 
>> Also the base of OS X and some big name routers. Nothing of significance.
> 
> Streaming has little to do with the OS.  It's an application that could 
> have been done with Windows.  OS-X uses BSD Userland which, again, is
> applications and not OS.  Last I heard OS-X was using some some obscure
> kernel called XNU that they developed in house.

MacOS X (new name: macOS) is certainly not a BSD system.

XNU is based on Next that Apple acquired.

It is a mix of many things:
* Mach kernel
* BSD file system and networking

The BSD userland stuff is not part of XNU but part of MacOS X.

https://en.wikipedia.org/wiki/Architecture_of_macOS#/media/File:Diagram_of_Mac_OS_X_architecture.svg

Arne