System extensions installed This computer has system extensions installed. System extensions can be difficult to uninstall. Review Apps crashing There have been numerous app crashes. Review Unsigned files There are unsigned software files installed. These files could be old, incompatible, and cause problems. They should be reviewed. Review System modifications There are a large number of system modifications running in the background. Review Insufficient permissions EtreCheck running under a standard user. Diagnostic information may not be available. Review Limited permissions More information may be available with Full Disk Access.