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Replaced the optical with a second sdd that initially is seen and I can work with it but after a time it disappears only to return when I re-boot. Any idea what to troubleshoot?
You’ll need to check if the system is able to support the drive. Some MacBook Pro’s have a timing issue with the optical drives SATA port as Apple only designed it to support the slower SATA II (3.0 Gb/s) optical drive. Review the notes section for your exact model here: OWC Data Doubler Keep in mind it makes no difference who’s carrier you use as the issue is within the system its self.
