3/16/2023 0 Comments External usb camera for macThis computer has five USB ports, and as you can see, it actually has four separate USB busses. The above system report is for a late-2009 Mac Mini. Click the “System Report” button, and locate the USB section on the left side of the window: To see how many busses your Mac has, open the “System Information” app (“System Profiler” on systems before OS X 10.7) from your /Application/Utilities/ folder. On other Macs there may be multiple busses. In some Macs, all the ports share the same bus, and therefore the same bandwidth. Therefore, it is not possible to use more than one camera on the same USB bus at full resolution.Īlthough Mac computers typically have more than one built-in USB port, they vary in how many USB busses they have. One USB camera will use most of the bandwidth on a USB bus (this is because USB cameras use uncompressed video, as opposed to network cameras, which use compressed video). Therefore, a USB camera can potentially be a cheap and useful addition to a video surveillance system in certain circumstances. However, we understand that they can be an attractive option in some situations due to their low cost and simple plug-and-play connection to the computer. This is partly due to their general low video quality and short cable length, but also due to bandwidth limitations on the USB bus making it difficult to use multiple USB cameras at the same time. We typically advise against using USB cameras with SecuritySpy.
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