I think I found what's going on. Under "Disabled Software", this is what appears. It looks like OS11 is preventing this from running. I've been on the phone with Apple support and they are blaming LaCie (which might be justified). Is there any way to allow this software to run, and see if it resolves the issue, or figure out why it was blocked? 7NPX47N25H - com.lacie.driver.mvumi: Version: 1.3.21 Reason: No User Consent Date Disabled: Unknown