I also have this happen from time to time on various import operations, also on the Windows side… Don’t know if there are some automatic fixing routines being run in the background, or if the bad object report is just spurious…
For what I see on my iMac, all file types that are bad objects, and that activate the automatic control before the WHIP 5E41w NOT allow you to turn off the automatic verification.
IMPORTANT: The workaround that I presented above was ill-advised. This set a permanent flag. If you used this workaround, you will not get new notifications of bad objects ever until you run CheckNewObjects again and check the enabled box and restart Rhino. You will now receive new bad object warnings but you can ignore them for that particular modeling session.