While malware scanners can detect threats once definitions for them are available, you can monitor or lock your systems' launch agents folders to more proactively prevent attacks on your system.
Background updater services showing up may be from duplicate launch agent scripts being used to handle them.
New malware for OS X is making the rounds in security circles, called "Pintsized," but has not yet been determined to be much of a threat.
A new command-and-control Trojan for OS X appears to be associated with the Syrian Electronic Army.
Disguised as a legitimate project on GitHub called StealthBit, the malware installs a browser extension to look for and steal BitCoin wallet and account credentials.
A new malware for OS X also acts as a reminder to monitor the launch services in OS X as a security precaution.
A quick adjustment of the timeout values for key processes can greatly speed up otherwise laggy shutdowns in OS X.
After over a year of no apparent activity, a new variant of the Tibet malware affecting OS X systems has been found.
OS X does not provide a way to monitor XProtect updates, but you can set up a custom script to do so.
Tackling third-party launch agents and daemons may help odd system pauses after an OS update.