Upon the start of josm, it creates tons of warnings in the console log:
2021-09-03 10:11:37.901 WARNING: CSS parser not implemented yet
2021-09-03 10:11:37.901 WARNING: CSS parser not implemented yet
2021-09-03 10:11:37.902 WARNING: CSS parser not implemented yet
2021-09-03 10:11:37.902 WARNING: CSS parser not implemented yet
2021-09-03 10:11:37.902 WARNING: CSS parser not implemented yet
(much more of the same)
2021-09-03 10:11:43.173 WARNING: Could not create font Roadgeek 2005 Series F
2021-09-03 10:11:43.178 WARNING: Could not create font Roadgeek 2005 Series F
2021-09-03 10:11:43.181 WARNING: Could not create font Roadgeek 2005 Series D
2021-09-03 10:11:43.181 WARNING: Could not create font Roadgeek 2005 Series F
2021-09-03 10:11:43.182 WARNING: Could not create font Roadgeek 2005 Series D
2021-09-03 10:11:43.182 WARNING: Could not create font Roadgeek 2005 Series F
2021-09-03 10:11:43.185 WARNING: Could not create font Roadgeek 2005 Series D
2021-09-03 10:11:43.186 WARNING: Could not create font Roadgeek 2005 Series D
2021-09-03 10:11:46.288 WARNING: Could not create font Roboto-Bold, Roboto
2021-09-03 10:11:46.303 WARNING: Could not create font Roboto-Bold, Roboto
2021-09-03 10:11:46.317 WARNING: Could not create font ClearviewHwy-1B
2021-09-03 10:11:46.318 WARNING: Could not create font ClearviewHwy-1B
2021-09-03 10:11:46.320 WARNING: Could not create font ClearviewHwy-1B
2021-09-03 10:11:46.320 WARNING: Could not create font ClearviewHwy-1B
2021-09-03 10:11:46.326 WARNING: Could not create font ClearviewHwy-1B
2021-09-03 10:11:46.327 WARNING: Could not create font ClearviewHwy-1B
2021-09-03 10:11:46.330 WARNING: Could not create font ClearviewHwy-1B
2021-09-03 10:11:46.331 WARNING: Could not create font ClearviewHwy-1B
2021-09-03 10:11:46.344 WARNING: Could not create font ClearviewHwy-1B
2021-09-03 10:11:46.344 WARNING: Could not create font ClearviewHwy-1B
2021-09-03 10:11:46.347 WARNING: Could not create font ClearviewHwy-1B
2021-09-03 10:11:46.347 WARNING: Could not create font ClearviewHwy-1B
2021-09-03 10:11:46.350 WARNING: Could not create font ClearviewHwy-1B
2021-09-03 10:11:46.350 WARNING: Could not create font ClearviewHwy-1B
2021-09-03 10:11:46.352 WARNING: Could not create font ClearviewHwy-1B
2021-09-03 10:11:46.352 WARNING: Could not create font ClearviewHwy-1B
2021-09-03 10:11:46.539 WARNING: Could not create font Interstate-Bold, Interstate
2021-09-03 10:11:46.540 WARNING: Could not create font Interstate-Bold, Interstate
also reported as https://josm.openstreetmap.de/ticket/21282#ticket
josm Revision:18275, Mac OS X 10.14.6
Upon the start of josm, it creates tons of warnings in the console log: