I've been reading on these Adobe introduced vulnerabilities (see http://it.slashdot.org/story/09/07/28/1412255/92-of-Windows-PCs-Vulnerable-To-Zero-Day-Attacks-On-Flash) which can be exploited on OS X as well. I've been using flash with Firefox, how do I know my system is not compromised? How do *you* know yours is not? Is there any way to find this out? Does Apple provide any tools of detection (think rootkit revealer provided by Microsoft), or any 3rd party tools? Especially troubling is the fact expressed by some security experts that OS X is by definition more hackable than other OS's. See http://blogs.zdnet.com/security/?p=2941 for example: Also think about the apps we download from the Internet. How do I (or you) know the app I've downloaded and installed/run hasn't been compromised by somebody (if not the author then a 3rd party)? So few of their authors offer an md5 checksum to verify its integrity. Thanks.