fix resource_tracker warning on OSX #902

Job	Run time
lint	33s
build	38s
cleanup_buckets	28s
test (ubuntu-latest, 3.7)	5m 29s
test (ubuntu-latest, 3.8)	49s
test (ubuntu-latest, 3.9)	51s
test-windows-bundle (windows-2019)	9m 31s
test (ubuntu-latest, 3.10)	50s
test-linux-bundle	6m 5s
test-windows-bundle (windows-latest)	9m 33s
test-docker	5m 10s
test (ubuntu-latest, 3.11)	4m 30s
test (ubuntu-latest, 3.12)	1m 0s
test (ubuntu-latest, pypy-3.10-nightly)	8m 50s
test (macos-latest, 3.7)	6m 53s
test (macos-latest, 3.8)	1m 40s
test (macos-latest, 3.9)	1m 19s
test (macos-latest, 3.10)	1m 13s
test (macos-latest, 3.11)	5m 42s
test (macos-latest, 3.12)	1m 7s
test (windows-latest, 3.7)	6m 1s
test (windows-latest, 3.8)	1m 42s
test (windows-latest, 3.9)	1m 37s
test (windows-latest, 3.10)	1m 43s
test (windows-latest, 3.11)	6m 38s
test (windows-latest, 3.12)	1m 37s
doc	54s
	1h 32m 23s

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