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Time Machine won back up onto my new external hard drive. What gives?

April 26, 2017external hard drive gives Machine time

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Time Machine won back up onto my new external hard drive. What gives?

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Time Machine requires that the backup disk be partitioned using GPT or APM scheme. The MBR scheme (use by PCs) is not supported, even with an HFS+ formatted volume. Use Disk Utility to re-partition the disk and replacce the MBR partition map with a GPT or APM scheme.