
Let's expand on the information you supplied...
If we look at your source of information for OS security vulnerabilities, and post the rest of the information to neglected to mention:
Windows 7:
Most Critical Unpatched
The most severe unpatched Secunia advisory affecting Microsoft Windows 7, with all vendor patches applied, is rated *Highly critical *.
OSX:
No information listed.
SUSE 10:
Most Critical Unpatched
There are no unpatched Secunia advisories affecting this product, when all vendor patches are applied..
Also, if you include Ubuntu in your information:
Affected By 62 Secunia advisories
251 Vulnerabilities
Monitor Product Receive alerts for this product
Unpatched 0% (0 of 62 Secunia advisories)
Most Critical Unpatched
There are no unpatched Secunia advisories affecting this product, when all vendor patches are applied..