[Interest] macOS Big Sur ARM Build

Thiago Macieira thiago.macieira at intel.com
Wed Jun 24 18:28:46 CEST 2020

On Wednesday, 24 June 2020 08:50:17 PDT David M. Cotter wrote:
> > Apple ... said that they are still supporting carbon ... on the ARM based
> > Macs
> wait what?
> reference please?
> carbon is 32bit. 32bit is dead on Catalina, right? and Big Sur is
> post-catalina.  so... have i missed something?

I don't think Lars used the right term when he said Carbon. Carbon.framework 
definitely is non-working in 64-bit mode:

$ objdump -f /System/Library/Frameworks/Carbon.framework/Carbon

/System/Library/Frameworks/Carbon.framework/Carbon:     file format Mach-O 64-
bit x86-64

XcodeDefault.xctoolchain/usr/bin/objdump: error: '/System/Library/Frameworks/
Carbon.framework/Carbon': Invalid/Unsupported object file format.

What he meant is that Qt uses a number of C APIs even in 64-bit mode that used 
to be loosely called "Carbon" back in the day, opposing to the Objective C 
APIs called "Cocoa". Example: CoreFoundation.

Thiago Macieira - thiago.macieira (AT) intel.com
  Software Architect - Intel System Software Products

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