How do I remove the Legacy System Extension signed by "Romans Kisil"?
Does anyone know how to remove Legacy System Extension or how to go about contacting the developer ?
MacBook Pro Retina
To be able to remove this extension, you will need to locate it. These extensions, also called kernel extensions, typically will be installed it, at least, two locations on a Mac:
- /Library/Extensions/
- /System/Library/Extensions/
To get a list of all kernel extension on your Mac, you would enter the following command in the Terminal app: kextfind
To narrow that down to a specific extension, that command would be: kextfind -b <extension name> -print
Alternatively, you can run an EtreCheck report to locate it. EtreCheck is a troubleshooting tool developed by a valued forum member that greatly aids in troubleshooting Mac issues, including hunting down missing files.
Ref: Using EtreCheck to Troubleshoot Potential… - Apple Community
For trying to contact the developer, see if the following support article can help: Contact a third-party vendor - Apple Support