Recent Mac OS X 10.3.8 release caused conflicts with Macally iShock OS X driver. The first symptom is that system.log file grows quickly in size due to ongoing generation of error log related to iShockXDriver, it will fill up the whole hard drive space if not stopped in time. The second symptom is CPU usage by iShockXDriver process can reach as high as 90% for single processor, or up to 120% for dual processor, therefore the system gets very slow.
If you already upgraded to 10.3.8 and experienced the problems, you need to clear the huge log file and remove iShock software temporarily with these four steps,:
Version 1.0.4: iShockXDriverInstaller is updated to 1.0.4. Clean up the installer folders/files. No driver change.
Mac OS X 10.2.1 or later, Macally iShock/iShock II
*Previously available here