fix resource_tracker warning on OSX #917

Job	Run time
lint	38s
cleanup_buckets	33s
build	26s
doc	57s
test-docker	4m 19s
test-linux-bundle	7m 42s
test-windows-bundle (windows-2019)	9m 31s
test (ubuntu-latest, 3.7)	5m 23s
test (ubuntu-latest, 3.8)	48s
test-windows-bundle (windows-latest)	10m 34s
test (ubuntu-latest, 3.9)	44s
test (ubuntu-latest, 3.10)	44s
test (ubuntu-latest, 3.11)	4m 17s
test (ubuntu-latest, 3.12)	57s
test (ubuntu-latest, pypy-3.10-nightly)	8m 46s
test (macos-latest, 3.7)	6m 34s
test (macos-latest, 3.8)	1m 15s
test (macos-latest, 3.9)	3m 45s
test (macos-latest, 3.10)	57s
test (macos-latest, 3.11)	5m 16s
test (macos-latest, 3.12)	1m 45s
test (windows-latest, 3.7)	6m 9s
test (windows-latest, 3.8)	1m 54s
test (windows-latest, 3.9)	1m 40s
test (windows-latest, 3.10)	1m 25s
test (windows-latest, 3.11)	6m 4s
test (windows-latest, 3.12)	1m 37s
	1h 34m 40s

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