/Users/myname/.conda/envs/geocat/lib/python3.10/site-packages/matplotlib/mpl-data/fonts/ttf/

找到虚拟环境对应的matplotlib绘图库下面的字体所在的文件夹，手动将下载的缺失字体丢进去运行下面的代码即可

from matplotlib import font_manager
from matplotlib import rcParams
import os


# 字体加载
font_path ="/Users/myname/.conda/envs/geocat/lib/python3.10/site-packages/matplotlib/mpl-data/fonts/ttf/TimesNewRoman.ttf"

font_manager.fontManager.addfont(font_path)
prop = font_manager.FontProperties(fname=font_path)
# print(prop.get_name())  # 显示当前使用字体的名称