fix resource_tracker warning on OSX #923

Job	Run time
lint	31s
cleanup_buckets	31s
build	27s
doc	49s
test-linux-bundle	6m 17s
test-docker	5m 22s
test-windows-bundle (windows-2019)	9m 12s
test (ubuntu-latest, 3.7)	5m 26s
test-windows-bundle (windows-latest)	9m 30s
test (ubuntu-latest, 3.8)	49s
test (ubuntu-latest, 3.9)	47s
test (ubuntu-latest, 3.10)	49s
test (ubuntu-latest, 3.11)	4m 38s
test (ubuntu-latest, 3.12)	51s
test (ubuntu-latest, pypy-3.10-nightly)	8m 15s
test (macos-latest, 3.7)	5m 5s
test (macos-latest, 3.8)	59s
test (macos-latest, 3.9)	57s
test (macos-latest, 3.10)	2m 7s
test (macos-latest, 3.11)	5m 15s
test (macos-latest, 3.12)	1m 1s
test (windows-latest, 3.7)	5m 40s
test (windows-latest, 3.8)	1m 30s
test (windows-latest, 3.9)	1m 19s
test (windows-latest, 3.10)	1m 27s
test (windows-latest, 3.11)	6m 45s
test (windows-latest, 3.12)	1m 35s
	1h 27m 54s

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