thezak
Level 3 (509 points)
Mac OS X

Q: SyminternetSecurity.kest

What does the popup mean?...

_________________________________________________

[icon. white exclamation point inside a golden triangle]

The system extension

"SyminternetSecurity.kest" is not

compatible with this version of OS X and

can't be used.

Please contact the developer for updated software.

                                                          [      OK      ]

_________________________________________________

iMac, macOS Sierra (10.12)

Posted on Oct 19, 2016 2:13 AM

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thezak

Q: SyminternetSecurity.kest

  • All replies
  • Helpful answers

  • by Barney-15E,

    Barney-15E Barney-15E Oct 19, 2016 5:15 AM in response to thezak
    Level 9 (50,793 points)
    Mac OS X
    Oct 19, 2016 5:15 AM in response to thezak

    It means you have some third-party security crapware installed that is not compatible with Sierra. I'm guessing it is Symantec or Norton based on the "Sym" in front of the name.

    Just use their Uninstaller to remove the entire program. The only thing it ever does is cause problems like these.

  • by BobTheFisherman,

    BobTheFisherman BobTheFisherman Oct 19, 2016 7:31 AM in response to thezak
    Level 6 (15,707 points)
    Oct 19, 2016 7:31 AM in response to thezak

    Uninstall third party apps that claim to protect, clean, boost performance, manage, etc. your computer. They are not needed and may cause problems. Symantec Norton Anti Virus is an example of one such app.