{"id":"external-drives.drive-works-on-old-mac-but-not-new-mac","url":"/faq/external-drives/drive-works-on-old-mac-but-not-new-mac","category":{"id":"external-drives","title":"External drives"},"subcategory":{"id":"drive-problems","title":"Mounting and drive problems"},"question":"Why does my external drive work on my old Mac but not my new one?","alt_questions":["External drive not working on new MacBook","Drive recognized on old Mac not new Mac","New Mac won't mount my external drive","usb-a drive not working new macbook"],"short_answer":"Usually a setting or the connection: approve it under Allow accessories to connect on newer Mac laptops, try another adapter or cable, give it more power with a powered hub, and run First Aid if it's detected but won't mount.","answer_markdown":"Usually it's the connection or a setting rather than the drive. Check these, in order:\n\n1. **Allow accessories** — newer Mac laptops ask before a new accessory connects; if it was declined, the drive stays hidden. See [Allow accessory to connect](/faq/external-drives/what-is-allow-accessories-to-connect).\n2. **Adapter and cable** — a USB-A drive needs an adapter; cheap ones can be power- or data-limited. Try another.\n3. **Power** — new Mac ports or hubs may supply less than the drive needs; try a powered hub.\n4. **Format** — a drive formatted for very old systems still reads, but a damaged one may need **First Aid**.\n\nIf Disk Utility sees it but Finder doesn't, see [mounting a drive](/faq/external-drives/drive-shows-in-disk-utility-but-not-finder).","answer_html":"

Usually it's the connection or a setting rather than the drive. Check these, in order:

\n
  1. Allow accessories — newer Mac laptops ask before a new accessory connects; if it was declined, the drive stays hidden. See Allow accessory to connect.
  2. Adapter and cable — a USB-A drive needs an adapter; cheap ones can be power- or data-limited. Try another.
  3. Power — new Mac ports or hubs may supply less than the drive needs; try a powered hub.
  4. Format — a drive formatted for very old systems still reads, but a damaged one may need First Aid.
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If Disk Utility sees it but Finder doesn't, see mounting a drive.

","answer_text":"Usually it's the connection or a setting rather than the drive. Check these, in order:\n\n1. Allow accessories — newer Mac laptops ask before a new accessory connects; if it was declined, the drive stays hidden. See Allow accessory to connect.\n2. Adapter and cable — a USB-A drive needs an adapter; cheap ones can be power- or data-limited. Try another.\n3. Power — new Mac ports or hubs may supply less than the drive needs; try a powered hub.\n4. Format — a drive formatted for very old systems still reads, but a damaged one may need First Aid.\n\nIf Disk Utility sees it but Finder doesn't, see mounting a drive.","tags":["new mac","adapter","allow accessories"],"related":[{"id":"external-drives.what-is-allow-accessories-to-connect","question":"Why does my Mac ask to \"Allow accessory to connect\" when I plug in a drive?","url":"/faq/external-drives/what-is-allow-accessories-to-connect"},{"id":"external-drives.can-i-use-an-adapter-with-my-external-drive","question":"Can I use a USB-A drive with an adapter on my Mac?","url":"/faq/external-drives/can-i-use-an-adapter-with-my-external-drive"},{"id":"external-drives.drive-shows-in-disk-utility-but-not-finder","question":"Why does my external drive show in Disk Utility but not in Finder?","url":"/faq/external-drives/drive-shows-in-disk-utility-but-not-finder"}],"applies_to":"all","last_reviewed":"2026-10-01","title":"Why does my external drive work on my old Mac but not my new one? — Storage Studio FAQ","description":"Usually a setting or the connection: approve it under Allow accessories to connect on newer Mac laptops, try another adapter or cable, give it more power with a powered hub, and run First Aid if it's detected but won't mount.","crumbs":[{"name":"Home","path":"/"},{"name":"FAQ","path":"/faq/"},{"name":"External drives","path":"/faq/external-drives/"},{"name":"Why does my external drive work on my old Mac but not my new one?","path":"/faq/external-drives/drive-works-on-old-mac-but-not-new-mac"}],"jsonld":{"@context":"https://schema.org","@type":"FAQPage","url":"https://storagestudio.us/faq/external-drives/drive-works-on-old-mac-but-not-new-mac","inLanguage":"en","dateModified":"2026-10-01","mainEntity":[{"@type":"Question","name":"Why does my external drive work on my old Mac but not my new one?","alternateName":["External drive not working on new MacBook","Drive recognized on old Mac not new Mac","New Mac won't mount my external drive","usb-a drive not working new macbook"],"acceptedAnswer":{"@type":"Answer","text":"Usually it's the connection or a setting rather than the drive. Check these, in order:\n\n1. Allow accessories — newer Mac laptops ask before a new accessory connects; if it was declined, the drive stays hidden. See Allow accessory to connect.\n2. Adapter and cable — a USB-A drive needs an adapter; cheap ones can be power- or data-limited. Try another.\n3. Power — new Mac ports or hubs may supply less than the drive needs; try a powered hub.\n4. Format — a drive formatted for very old systems still reads, but a damaged one may need First Aid.\n\nIf Disk Utility sees it but Finder doesn't, see mounting a drive.","url":"https://storagestudio.us/faq/external-drives/drive-works-on-old-mac-but-not-new-mac"}}]},"fragment":"
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External drives · Mounting and drive problems

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Why does my external drive work on my old Mac but not my new one?

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Short answer: Usually a setting or the connection: approve it under Allow accessories to connect on newer Mac laptops, try another adapter or cable, give it more power with a powered hub, and run First Aid if it's detected but won't mount.

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Usually it's the connection or a setting rather than the drive. Check these, in order:

\n
  1. Allow accessories — newer Mac laptops ask before a new accessory connects; if it was declined, the drive stays hidden. See Allow accessory to connect.
  2. Adapter and cable — a USB-A drive needs an adapter; cheap ones can be power- or data-limited. Try another.
  3. Power — new Mac ports or hubs may supply less than the drive needs; try a powered hub.
  4. Format — a drive formatted for very old systems still reads, but a damaged one may need First Aid.
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If Disk Utility sees it but Finder doesn't, see mounting a drive.

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