Hi Karen!
This message is just to let you know that I am available to test the candidate fix for the older OSs in the New Launcher on my iMac Mid 2011 running macOS High Sierra v. 10.13.6.
Please let me know of anything I may do to offer even if a tiny help in your invaluable work.
Thanks.
Ari Siqueira
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Ari M. Siqueira, PhD
(19°57'S 44°15'W 780 m)