Mac Pro can't find external CD-ROM when plugged in. fix?

Mac Pro is not find my external CD/DVD/ROM when I plug.  I tried both USB ports.  These ports are working with my iPhone.  I did the update of Sierra recently.  I tried to restart my laptop with the trendy ROM and without being trendy. Nothing seems to work.  How can I find my plug-and-play CD/DVD/ROM?

Your external DVD drive is compatible with Mac OS X?

Tags: Notebooks

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