tensorflow: "No matching distribution found for tensorflow" when installing with pip on macOS 11

System information

• OS Platform and Distribution (e.g., Linux Ubuntu 16.04): macOS 11.2.1, x86-64
• TensorFlow installed from (source or binary): pip3 install tensorflow
• TensorFlow version: latest
• Python version: 3.8
• Installed using: pip3

Describe the problem

Installation with pip fails with:

$ pip3 install tensorflow
ERROR: Could not find a version that satisfies the requirement tensorflow (from versions: none)
ERROR: No matching distribution found for tensorflow

Provide the exact sequence of commands / steps that you executed before running into the problem

# TensorFlow apparently does not yet support 3.9, so fall back to 3.8
brew install python@3.8
brew link --overwrite python@3.8

pip3 install tensorflow

Any other info / logs

Here is verbose output:

$ pip3 install --upgrade -v tensorflow
Using pip 20.2.4 from /usr/local/lib/python3.8/site-packages/pip (python 3.8)
Non-user install because site-packages writeable
Created temporary directory: /private/var/folders/7g/m6tkc5n56l7ds_6dyr28jvb00000gn/T/pip-ephem-wheel-cache-v942l1u1
Created temporary directory: /private/var/folders/7g/m6tkc5n56l7ds_6dyr28jvb00000gn/T/pip-req-tracker-vv4x81gu
Initialized build tracking at /private/var/folders/7g/m6tkc5n56l7ds_6dyr28jvb00000gn/T/pip-req-tracker-vv4x81gu
Created build tracker: /private/var/folders/7g/m6tkc5n56l7ds_6dyr28jvb00000gn/T/pip-req-tracker-vv4x81gu
Entered build tracker: /private/var/folders/7g/m6tkc5n56l7ds_6dyr28jvb00000gn/T/pip-req-tracker-vv4x81gu
Created temporary directory: /private/var/folders/7g/m6tkc5n56l7ds_6dyr28jvb00000gn/T/pip-install-wju8g2vw
1 location(s) to search for versions of tensorflow:
* https://pypi.org/simple/tensorflow/
Fetching project page and analyzing links: https://pypi.org/simple/tensorflow/
Getting page https://pypi.org/simple/tensorflow/
Found index url https://pypi.org/simple
Looking up "https://pypi.org/simple/tensorflow/" in the cache
Request header has "max_age" as 0, cache bypassed
Starting new HTTPS connection (1): pypi.org:443
https://pypi.org:443 "GET /simple/tensorflow/ HTTP/1.1" 304 0
  Skipping link: none of the wheel's tags match: cp27-cp27m-macosx_10_11_x86_64: https://files.pythonhosted.org/packages/90/cf/1d1e12f9f39b6a0ed1c49792ef5ce7615dddc2ce7287fc83ede0dddb9b3c/tensorflow-0.12.0rc0-cp27-cp27m-macosx_10_11_x86_64.whl#sha256=feaf06c7df5c0a480654bf1f38dd4d3b809c7315502a7d9f295033f9d2bd9b13 (from https://pypi.org/simple/tensorflow/)
... OMITTING EXTREMELY LONG LIST OF WHEELS ...
  Skipping link: none of the wheel's tags match: cp38-cp38-win_amd64: https://files.pythonhosted.org/packages/ad/fc/fccaa149d7ccc165de01d62d19e5e9492e87ad23a7106f6dfe132800ca6f/tensorflow-2.4.1-cp38-cp38-win_amd64.whl#sha256=eedcf578afde5e6e69c75d796bed41093451cd1ab54afb438760e40fb74a09de (from https://pypi.org/simple/tensorflow/)
Given no hashes to check 0 links for project 'tensorflow': discarding no candidates
Exception information:
Traceback (most recent call last):
  File "/usr/local/lib/python3.8/site-packages/pip/_internal/cli/base_command.py", line 228, in _main
    status = self.run(options, args)
  File "/usr/local/lib/python3.8/site-packages/pip/_internal/cli/req_command.py", line 182, in wrapper
    return func(self, options, args)
  File "/usr/local/lib/python3.8/site-packages/pip/_internal/commands/install.py", line 323, in run
    requirement_set = resolver.resolve(
  File "/usr/local/lib/python3.8/site-packages/pip/_internal/resolution/legacy/resolver.py", line 183, in resolve
    discovered_reqs.extend(self._resolve_one(requirement_set, req))
  File "/usr/local/lib/python3.8/site-packages/pip/_internal/resolution/legacy/resolver.py", line 388, in _resolve_one
    abstract_dist = self._get_abstract_dist_for(req_to_install)
  File "/usr/local/lib/python3.8/site-packages/pip/_internal/resolution/legacy/resolver.py", line 339, in _get_abstract_dist_for
    self._populate_link(req)
  File "/usr/local/lib/python3.8/site-packages/pip/_internal/resolution/legacy/resolver.py", line 305, in _populate_link
    req.link = self._find_requirement_link(req)
  File "/usr/local/lib/python3.8/site-packages/pip/_internal/resolution/legacy/resolver.py", line 270, in _find_requirement_link
    best_candidate = self.finder.find_requirement(req, upgrade)
  File "/usr/local/lib/python3.8/site-packages/pip/_internal/index/package_finder.py", line 928, in find_requirement
    raise DistributionNotFound(
pip._internal.exceptions.DistributionNotFound: No matching distribution found for tensorflow
Removed build tracker: '/private/var/folders/7g/m6tkc5n56l7ds_6dyr28jvb00000gn/T/pip-req-tracker-vv4x81gu'

The cause seems to be that it expects at least one wheel whose tags match my machine, but none do. My guess is that this is due to using macOS 11. All lines look like macosx_10_*_x86_64, but I guess it’s looking for a line matching macosx_11_*_x86_64. (Apologies: I know nothing about the python ecosystem; this is just my educated guess.)