[issue41100] Support macOS 11 and Apple Silicon Macs

[Isuru Fernando]

Change by Isuru Fernando :


--
nosy: +isuruf
nosy_count: 23.0 -> 24.0
pull_requests: +25069
pull_request: https://github.com/python/cpython/pull/26474

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[issue41100] Support macOS 11 and Apple Silicon Macs

[Ned Deily]

Ned Deily  added the comment:

Thank you to everyone who contributed to this major undertaking!  A particular 
thank you to Lawrence for doing much of the initial work and paving the way. 
Now that 3.8 also supports Big Sur and Apple Silicon Macs as of the imminent 
3.8.10 release, it's time to close this issue. If new concerns arise, pleasa 
open or use other issues.

--
resolution:  -> fixed
stage: patch review -> resolved
status: open -> closed

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[issue41100] Support macOS 11 and Apple Silicon Macs

[Ned Deily]

Ned Deily  added the comment:


New changeset bb3ec9ceae7032457f6e7fb72b39aee95976051c by Miss Islington (bot) 
in branch '3.9':
bpo-41100: Update Misc/ACKS (GH-25808) (GH-25809)
https://github.com/python/cpython/commit/bb3ec9ceae7032457f6e7fb72b39aee95976051c


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[issue41100] Support macOS 11 and Apple Silicon Macs

[miss-islington]

Change by miss-islington :


--
pull_requests: +24496
pull_request: https://github.com/python/cpython/pull/25809

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[issue41100] Support macOS 11 and Apple Silicon Macs

[Ned Deily]

Ned Deily  added the comment:


New changeset 518f8b5dd50b73499282a1ef02b197af106ad118 by Ned Deily in branch 
'master':
bpo-41100: Update Misc/ACKS (GH-25808)
https://github.com/python/cpython/commit/518f8b5dd50b73499282a1ef02b197af106ad118


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[issue41100] Support macOS 11 and Apple Silicon Macs

[Łukasz Langa]

Łukasz Langa  added the comment:


New changeset b29d0a5a7811418c0a1082ca188fd4850185e290 by Ned Deily in branch 
'3.8':
[3.8] bpo-41100: Support macOS 11 Big Sur and Apple Silicon Macs (#25806)
https://github.com/python/cpython/commit/b29d0a5a7811418c0a1082ca188fd4850185e290


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[issue41100] Support macOS 11 and Apple Silicon Macs

[Ned Deily]

Change by Ned Deily :


--
pull_requests: +24495
stage: commit review -> patch review
pull_request: https://github.com/python/cpython/pull/25808

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[issue41100] Support macOS 11 and Apple Silicon Macs

[Ned Deily]

Ned Deily  added the comment:

Thanks, Max, for doing the backport to 3.8 hard work!  While PR 25274 covered 
most of the changes needed, there were some additional fixes and changes needed 
and I felt it was easier to cherry-pick all of the changes into a new PR. I 
have done extensive building and testing on Big Sur on both Apple Silicon and 
Intel Macs and regression building and testing on some older macOS versions 
including macOS 10.9 and python.org macOS installers. So far, it looks good to 
me. Assuming the 3.8 release manager has no objections, I will merge this in 
time for 3.8.10 and we can finally close this issue.

--
nosy: +lukasz.langa
stage: patch review -> commit review

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[issue41100] Support macOS 11 and Apple Silicon Macs

[Ned Deily]

Change by Ned Deily :


--
pull_requests: +24491
pull_request: https://github.com/python/cpython/pull/25806

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[issue41100] Support macOS 11 and Apple Silicon Macs

[Ned Deily]

Ned Deily  added the comment:

No problem. Also you should not need to specify sysroot if you are; the Apple 
compiler front-end takes care of that for you (see man xcrun for more details).

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[issue41100] Support macOS 11 and Apple Silicon Macs

[Harlan Cheer]

Harlan Cheer  added the comment:

@ned.deily sorry about that, will do that in the future. Thanks for replying.

in regard to the extra args, those were all added in an attempt to make things 
work, I should probably have shown an earlier log that excluded them. I wasn't 
sure setup.py would be the right place to look for more, I'll take a look there.

Thanks

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type:  -> compile error

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[issue41100] Support macOS 11 and Apple Silicon Macs

[Ned Deily]

Ned Deily  added the comment:

@harlantc, in general, please open new issues for new problems. That said, I 
took a quick look at the build.log you provided and it was not obvious exactly 
why things went wrong. The most obvious difference is that when I do a 3.9.4 
build, the extension module source paths (the -c arguments to the failing 
compiles) have been normalized by setup.py to absolute paths, whereas in the 
failing build.log they are unprefixed relative paths. I suggest you look at the 
top level setup.py file to figure out why that is the case in your build. I 
also note that the build appears to be on a very early release of macOS 11 Big 
Sur; it would be best to upgrade to the latest version of it and ensure you 
have the latest version of the Command Line Tools installed. Also, your 
configure arguments appear to be unnecessary complex: the -m64 and the --build 
and --target arguments shouldn't be necessary and we rarely test with 
--enable-shared on macOS. It's possible they are contributing factors.  If you 
do 
 find something that appears to be a Python build issue, please open a new 
issue with the details.

--
type: compile error -> 

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[issue41100] Support macOS 11 and Apple Silicon Macs

[Harlan Cheer]

Harlan Cheer  added the comment:

Trying to build from source to Apple M1 Big Sur (macOS 11), and it's failing to 
compile the standard library extension modules. It seems to be that the .c 
files are not being located properly, but looking in Modules/ I can see all the 
required source files are there. attached is a typical build log, have tried a 
variety of options to no avail. Similar build configurations have worked for 
previous MacOS releases, which leads me to believe this is something else. I've 
searched fairly exhaustively for any information related to this and come up 
with nothing.

--
nosy: +harlantc
type:  -> compile error
Added file: https://bugs.python.org/file49962/build.log

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[issue41100] Support macOS 11 and Apple Silicon Macs

[STINNER Victor]

STINNER Victor  added the comment:

> Is there any hope of a backport to 3.7? Or has that ship sailed?

Python 3.7 doesn't accept bugfixes anymore, nor new features, nor new platofrm 
support (macOS 11).

The 3.7 branch now only accept security fixes:
https://devguide.python.org/#status-of-python-branches

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[issue41100] Support macOS 11 and Apple Silicon Macs

[Benoit Hudson]

Benoit Hudson  added the comment:

Is there any hope of a backport to 3.7? Or has that ship sailed?

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[issue41100] Support macOS 11 and Apple Silicon Macs

[Maxime Belanger]

Maxime Belanger  added the comment:

I had some time today, so I took a crack at merging this into Python 3.8. I've 
filed GH-25274 with my proposal.

To summarize, I'm suggesting back porting all changes from bpo-41100 (as well 
as the subsequent bpo-42688) but without the weak-linking changes to 
`posixmodule` and co, the installer changes and the `universal2` variant. This 
means we don't support `arm64` officially, but someone can build for it from 
source if they'd like.

This should unblock Homebrew (which currently manually patches based on some 
obsolete PRs) as well as folks who build from source and have a particular need 
(as we would for example at Dropbox).

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[issue41100] Support macOS 11 and Apple Silicon Macs

[Max Bélanger]

Change by Max Bélanger :


--
nosy: +maxbelanger
nosy_count: 18.0 -> 19.0
pull_requests: +24010
pull_request: https://github.com/python/cpython/pull/25274

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[issue41100] Support macOS 11 and Apple Silicon Macs

[Roundup Robot]

Change by Roundup Robot :


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pull_requests: +23769
pull_request: https://github.com/python/cpython/pull/25014

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[issue41100] Support macOS 11 and Apple Silicon Macs

[Gregory Szorc]

Gregory Szorc  added the comment:

I ran into a minor issue with the ctypes extension and the 
_dyld_shared_cache_contains_path dependency that was added as part of this work 
(commit e8b1c038b14b5fc8120aab62c9bf5fb840274cb6).

When building on Intel macOS 10.15 using an 11.x SDK, the configure check for 
this symbol passes (#define HAVE_DYLD_SHARED_CACHE_CONTAINS_PATH 1) and the 
extension compiles (albeit with a lot of deprecation warnings spewing from the 
Apple SDK headers). However, at run-time, we blow up due to a missing symbol 
error:

```
2021-02-21T21:57:21.4116370Z cpython-3.9> clang -bundle -undefined 
dynamic_lookup -isysroot 
/Applications/Xcode_12.4.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX11.1.sdk
 
build/temp.macosx-11.0-x86_64-3.9/private/var/folders/24/8k48jl6d249_n_qfxwsl6xvmgn/T/tmpasb48bzk/Python-3.9.2/Modules/_decimal/_decimal.o
 
build/temp.macosx-11.0-x86_64-3.9/private/var/folders/24/8k48jl6d249_n_qfxwsl6xvmgn/T/tmpasb48bzk/Python-3.9.2/Modules/_decimal/libmpdec/basearith.o
 
build/temp.macosx-11.0-x86_64-3.9/private/var/folders/24/8k48jl6d249_n_qfxwsl6xvmgn/T/tmpasb48bzk/Python-3.9.2/Modules/_decimal/libmpdec/constants.o
 
build/temp.macosx-11.0-x86_64-3.9/private/var/folders/24/8k48jl6d249_n_qfxwsl6xvmgn/T/tmpasb48bzk/Python-3.9.2/Modules/_decimal/libmpdec/context.o
 
build/temp.macosx-11.0-x86_64-3.9/private/var/folders/24/8k48jl6d249_n_qfxwsl6xvmgn/T/tmpasb48bzk/Python-3.9.2/Modules/_decimal/libmpdec/convolute.o
 build/temp.macosx-11.0-x86_64-3.9/private/var/fol
 
ders/24/8k48jl6d249_n_qfxwsl6xvmgn/T/tmpasb48bzk/Python-3.9.2/Modules/_decimal/libmpdec/crt.o
 
build/temp.macosx-11.0-x86_64-3.9/private/var/folders/24/8k48jl6d249_n_qfxwsl6xvmgn/T/tmpasb48bzk/Python-3.9.2/Modules/_decimal/libmpdec/difradix2.o
 
build/temp.macosx-11.0-x86_64-3.9/private/var/folders/24/8k48jl6d249_n_qfxwsl6xvmgn/T/tmpasb48bzk/Python-3.9.2/Modules/_decimal/libmpdec/fnt.o
 
build/temp.macosx-11.0-x86_64-3.9/private/var/folders/24/8k48jl6d249_n_qfxwsl6xvmgn/T/tmpasb48bzk/Python-3.9.2/Modules/_decimal/libmpdec/fourstep.o
 
build/temp.macosx-11.0-x86_64-3.9/private/var/folders/24/8k48jl6d249_n_qfxwsl6xvmgn/T/tmpasb48bzk/Python-3.9.2/Modules/_decimal/libmpdec/io.o
 
build/temp.macosx-11.0-x86_64-3.9/private/var/folders/24/8k48jl6d249_n_qfxwsl6xvmgn/T/tmpasb48bzk/Python-3.9.2/Modules/_decimal/libmpdec/mpalloc.o
 
build/temp.macosx-11.0-x86_64-3.9/private/var/folders/24/8k48jl6d249_n_qfxwsl6xvmgn/T/tmpasb48bzk/Python-3.9.2/Modules/_decimal/libmpdec/mpdecimal
 .o 
build/temp.macosx-11.0-x86_64-3.9/private/var/folders/24/8k48jl6d249_n_qfxwsl6xvmgn/T/tmpasb48bzk/Python-3.9.2/Modules/_decimal/libmpdec/numbertheory.o
 
build/temp.macosx-11.0-x86_64-3.9/private/var/folders/24/8k48jl6d249_n_qfxwsl6xvmgn/T/tmpasb48bzk/Python-3.9.2/Modules/_decimal/libmpdec/sixstep.o
 
build/temp.macosx-11.0-x86_64-3.9/private/var/folders/24/8k48jl6d249_n_qfxwsl6xvmgn/T/tmpasb48bzk/Python-3.9.2/Modules/_decimal/libmpdec/transpose.o
 
-L/var/folders/24/8k48jl6d249_n_qfxwsl6xvmgn/T/tmpasb48bzk/tools/pyhost/lib 
-L/usr/local/lib -lm -o 
build/lib.macosx-11.0-x86_64-3.9/_decimal.cpython-39-darwin.so
2021-02-21T21:57:27.1635100Z cpython-3.9> *** WARNING: renaming "_ctypes" since 
importing it failed: 
dlopen(build/lib.macosx-11.0-x86_64-3.9/_ctypes.cpython-39-darwin.so, 2): 
Symbol not found: __dyld_shared_cache_contains_path
2021-02-21T21:57:27.1637220Z cpython-3.9>   Referenced from: 
build/lib.macosx-11.0-x86_64-3.9/_ctypes.cpython-39-darwin.so (which was built 
for Mac OS X 11.0)
2021-02-21T21:57:27.1638560Z cpython-3.9>   Expected in: 
/usr/lib/libSystem.B.dylib
2021-02-21T21:57:27.1639770Z cpython-3.9>  in 
build/lib.macosx-11.0-x86_64-3.9/_ctypes.cpython-39-darwin.so
```

(This build output is from 
https://github.com/indygreg/python-build-standalone/runs/1947611547?check_suite_focus=true)

The missing symbol is provided by libdyld.dylib, which doesn't appear to be 
linked directly by CPython's build system.

I'm only able to reproduce this on a GitHub Actions 10.5 machine using the 11.1 
SDK: it seems to work fine on both an 11.1 Intel and M1 device.

I reckon the correct fix is to have _ctypes link libdyld is this build 
configuration. I was also able to work around it in python-build-standalone by 
unsetting HAVE_DYLD_SHARED_CACHE_CONTAINS_PATH (hacky solution but this feature 
isn't needed by the build that was failing). And of course linking a non-Apple 
libffi should also work, which is potentially why pyenv/Homebrew/etc users 
aren't noticing.

python-build-standalone uses its own Clang built from source, so it is entirely 
possible there's something differing between the Apple Clang and my Clang 
causing this to fail. However, at least 1 other person ran into this in the 
wild 
(https://stackoverflow.com/questions/65853539/symbol-not-found-dyld-shared-cache-contains-path-on-osx-after-installl-from),
 so it might be generic.

[issue41100] Support macOS 11 and Apple Silicon Macs

[Mark Dickinson]

Change by Mark Dickinson :


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nosy:  -mark.dickinson

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[issue41100] Support macOS 11 and Apple Silicon Macs

[Ronald Oussoren]

Ronald Oussoren  added the comment:

There is no ETA. I'm spending more time away from the computer and on other 
projects when I'm not at work. I also have no personal need for 3.8 support.

If anyone else is up to the job: the back port to 3.9 should be a good starting 
point, but I don't trust the output of the cherry_picker tool to 3.8.

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[issue41100] Support macOS 11 and Apple Silicon Macs

[John Reese]

John Reese  added the comment:

Is there an ETA for having Big Sur support backported to the 3.8 branch, or is 
it already there and I'm just not seeing it here?

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[issue41100] Support macOS 11 and Apple Silicon Macs

[Ned Deily]

Ned Deily  added the comment:

> Are there plans to backport PR 22855 to any branches older than 3.9?

The plan is to also support 3.8 on Big Sur and Apple Silicon as 3.8 is still in 
bugfix mode.  There are no plans to backport support to 3.7 and 3.6 which are 
in the security-fix-only phase of their release cycles.

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[issue41100] Support macOS 11 and Apple Silicon Macs

[Joshua Root]

Joshua Root  added the comment:

Are there plans to backport PR 22855 to any branches older than 3.9?

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[issue41100] Support macOS 11 and Apple Silicon Macs

[Andy Dirnberger]

Change by Andy Dirnberger :


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[issue41100] Support macOS 11 and Apple Silicon Macs

[Ned Deily]

Ned Deily  added the comment:


New changeset 96d906b144e6e6aa96c5ffebecbcc5d38034bbda by Miss Islington (bot) 
in branch '3.9':
bpo-41100: in test_platform, ignore 10.16 (GH-23485) (GH-23486)
https://github.com/python/cpython/commit/96d906b144e6e6aa96c5ffebecbcc5d38034bbda


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[issue41100] Support macOS 11 and Apple Silicon Macs

[miss-islington]

Change by miss-islington :


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pull_requests: +22373
pull_request: https://github.com/python/cpython/pull/23486

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[issue41100] Support macOS 11 and Apple Silicon Macs

[Ned Deily]

Ned Deily  added the comment:


New changeset c0c23ea72b76b06b7db0d09415fa90bab8ded63a by Ned Deily in branch 
'master':
bpo-41100: in test_platform, ignore 10.16 (GH-23485)
https://github.com/python/cpython/commit/c0c23ea72b76b06b7db0d09415fa90bab8ded63a


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[issue41100] Support macOS 11 and Apple Silicon Macs

[Ned Deily]

Change by Ned Deily :


--
pull_requests: +22372
pull_request: https://github.com/python/cpython/pull/23485

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[issue41100] Support macOS 11 and Apple Silicon Macs

[miss-islington]

miss-islington  added the comment:


New changeset 3266991e721286e942125350ca41e1403d8384d6 by Miss Islington (bot) 
in branch '3.9':
bpo-41100: minor build installer fixes (GH-23480)
https://github.com/python/cpython/commit/3266991e721286e942125350ca41e1403d8384d6


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[issue41100] Support macOS 11 and Apple Silicon Macs

[miss-islington]

Change by miss-islington :


--
pull_requests: +22371
pull_request: https://github.com/python/cpython/pull/23484

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[issue41100] Support macOS 11 and Apple Silicon Macs

[Ned Deily]

Ned Deily  added the comment:


New changeset 936533ca0415c40dc64ccb5f8857720f32b3fcb4 by Ned Deily in branch 
'master':
bpo-41100: minor build installer fixes (GH-23480)
https://github.com/python/cpython/commit/936533ca0415c40dc64ccb5f8857720f32b3fcb4


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[issue41100] Support macOS 11 and Apple Silicon Macs

[Ned Deily]

Change by Ned Deily :


--
pull_requests: +22370
pull_request: https://github.com/python/cpython/pull/23480

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[issue41100] Support macOS 11 and Apple Silicon Macs

[Ned Deily]

Ned Deily  added the comment:


New changeset 5aa6c99da1087ded0ccb99bb12591e5ab31d75c3 by Ned Deily in branch 
'3.9':
bpo-41100: Update Whatsnew and installer ReadME for 3.9.1 (GH-23472)
https://github.com/python/cpython/commit/5aa6c99da1087ded0ccb99bb12591e5ab31d75c3


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[issue41100] Support macOS 11 and Apple Silicon Macs

[Ned Deily]

Change by Ned Deily :


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pull_requests: +22362
pull_request: https://github.com/python/cpython/pull/23472

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[issue41100] Support macOS 11 and Apple Silicon Macs

[Ned Deily]

Change by Ned Deily :


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pull_requests:  -21922

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[issue41100] Support macOS 11 and Apple Silicon Macs

[Ronald Oussoren]

Ronald Oussoren  added the comment:


New changeset e8b1c038b14b5fc8120aab62c9bf5fb840274cb6 by Ronald Oussoren in 
branch '3.9':
[3.9] bpo-41100: Support macOS 11 and Apple Silicon (GH-22855) (GH-23295)
https://github.com/python/cpython/commit/e8b1c038b14b5fc8120aab62c9bf5fb840274cb6


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[issue41100] Support macOS 11 and Apple Silicon Macs

[Ronald Oussoren]

Change by Ronald Oussoren :


--
pull_requests: +22349
pull_request: https://github.com/python/cpython/pull/23293

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[issue41100] Support macOS 11 and Apple Silicon Macs

[Ned Deily]

Ned Deily  added the comment:


New changeset 442746af649cc2c20d690acfabf44ab0e06c36b4 by Ronald Oussoren in 
branch 'master':
bpo-41100: Stripping '-arch arm64' didn't work after all (GH-23280)
https://github.com/python/cpython/commit/442746af649cc2c20d690acfabf44ab0e06c36b4


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[issue41100] Support macOS 11 and Apple Silicon Macs

[Ned Deily]

Ned Deily  added the comment:

@mattip, it could also be due to https://github.com/pypa/packaging/pull/319. 
I’m away from the keyboard fir the moment and can’t investigate further.

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[issue41100] Support macOS 11 and Apple Silicon Macs

[mattip]

mattip  added the comment:

Over at NumPy we are getting reports that some python built for macOSx 11 is 
not accepting wheels with the `macosx_10_9_x86_64` platform tag. Could it be 
related to this issue, another open issue, or some other provider's python? 
xref https://github.com/numpy/numpy/issues/17784

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nosy: +mattip

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[issue41100] Support macOS 11 and Apple Silicon Macs

[Max Desiatov]

Change by Max Desiatov :


--
nosy:  -MaxDesiatov

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[issue41100] Support macOS 11 and Apple Silicon Macs

[Ned Deily]

Change by Ned Deily :


--
title: Build failure on macOS 11 (beta) -> Support macOS 11 and Apple Silicon 
Macs

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