I had to look for an alternative when the optical drive in my 2011 iMac failed. It took a bit of effort to get the operating system to recognize the Buffalo Drive, but now it works for both reading and writing, at least for now as I've only been using it for about two months. I haven't tried M-DISC in it yet, but I plan to do so later. The mechanism is a bit filigree, but the functionality is great for the price.
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