### Bug summary On the `macosx` backend, the subplot adjustment window is appearing 1/4 sized for me: <img width="601" alt="Screenshot 2021-11-16 at 10 33 33" src="https://user-images.githubusercontent.com/6197628/141969735-3974c596-36f8-4170-8ce6-9c0ee4082df0.png"> I'm using a retina display at (2560 × 1600) resolution. ### Code for reproduction ```python import matplotlib.pyplot as plt fig, ax = plt.subplots() plt.show() ``` ### Actual outcome Compressed interactive widgets. ### Expected outcome Widgets fill full window. ### Additional information _No response_ ### Operating system macOS Big Sur (11.6) ### Matplotlib Version matplotlib-3.5.0.dev2555+g4a44cb277e ### Matplotlib Backend macosx ### Python version 3.9.7 ### Jupyter version _No response_ ### Installation git checkout