You're looking at StableBuild's Deleted PyPI mirror - where we index all deleted packages from the Python package registry.

fiftyone-desktop
0.21.2

This version was deleted from PyPI around 2024-01-23. Installing fails with:
$ pip3 install fiftyone-desktop==0.21.2 ERROR: Could not find a version that satisfies the requirement fiftyone-desktop==0.21.2
View other deleted versions of fiftyone-desktop

Install through StableBuild

You can install this package from StableBuild's PyPI snapshots from before the version was deleted:
pip3 install \ -i https://YOUR_API_KEY.pypimirror.stablebuild.com/2024-01-22/ \ fiftyone-desktop==0.21.2
Sign up for StableBuild to get an API key (it's free and takes <60 seconds!)

Or, download files manually

And install manually via pip:
fiftyone_desktop-0.21.2-py3-none-macosx_10_10_x86_64.whl (78.6MB)
fiftyone_desktop-0.21.2-py3-none-macosx_11_10_arm64.whl (80.6MB)
fiftyone_desktop-0.21.2-py3-none-manylinux1_x86_64.whl (81.3MB)
fiftyone_desktop-0.21.2-py3-none-manylinux2014_aarch64.whl (87.2MB)
fiftyone_desktop-0.21.2-py3-none-win_amd64.whl (55.4MB)