How can I check if my expansion card is properly detected by Mac OS?

To confirm that the Mac OS detects your expansion card, complete the following: In the upper-left screen, click the Apple icon. Click About This Mac . Click More Info or System Report . Under the appropriate heading, confirm that your expansion card is listed and that there isn't an error. For example, a network card would be under Ethernet Cards . You may need to refresh the System Information page after you plug in your device. To do so, press Command + R with the System Information page open. Your expansion card is listed according to the name of the chipset. To determine the name of the chipset of your expansion card, navigate to www.StarTech.com and look on the Technical Specifications tab for your product.