Q: Will a Lexmark Pro 200-S500 printer work with my iMac OS X 10.9.4?

Hello Kerrycop43,

There should be appropriate software available for your printer in Mavericks, as the device and its driver version are listed in the article below.

OS X: Printer and scanner software available for download

http://support.apple.com/kb/HT3669

The article linked below details some troubleshooting steps that may help get your printer working, such as resetting your Mac's printer system.

Troubleshooting printer issues in OS X

http://support.apple.com/kb/TS3147

Cheers,

Allen