syslogd is a daemon/background process that logs and generates messages from the system. if this is eating up your CPU, you can find the offending process and kill it.
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Open up terminal and run
tail -f /var/log/system.log
. You may see some output like this, but it will be very different for you machine:Jun 12 11:17:08 lfender-mbp kernel[0]: *** kernel exceeded 500 log message per second limit - remaining messages this second discarded ***
Jun 12 11:17:09 lfender-mbp kernel[0]: Data/Stack execution not permitted: ruby[pid 72771] at virtual address 0x7fbd9c078000, protections were read-write