MacBook not Detecting External Hard Drive

There may be an appropriate path to adapt these external products to

your newest edition MacBook and/or MacBook Pro model with similar

port configurations by use of correct adapters. ~ Active, not passive.
Power is expected to pass through for data, and etc; to connect them.

• Connect with Thunderbolt 3 on your new MacBook Pro - Apple Support

//support.apple.com/en-us/HT207256

Other details and further information links were in the previously posted topic:

• Using USB-C and Thunderbolt 3 (USB-C) ports and adapters on your Mac notebook - Apple Support

Hopefully the correct adapters for the newer hardware will suffice if you

can obtain them from a mac-centric vendor, Apple Store, or an AASP.

Good luck & happy computing! 🙂

Hey Im also having the same problem, my new MBP not recognizing my self powered USB 3 hard disk when I hooked it up it using a multiport adapter.

Are you saying it works if you use a dedicated USB C to regular USB adapter?

Thanks.

Do you mind sharing what you did to get it to work. I am in the same boat, i verified it has power tried seveal USB C adapaters and a dock. Verified disk against a Windows machine, reset the SMC, none of these helped.

Sorry. I hit send by misteake

The laptop ( macPro2017) recogizes my self powered HD if i plug it directly into the laptop's USB-C port. If I use the USBC Multiport adapter it doesn't recognize it.

I exchanged the Multiport adapter thinking it was defective and the same thing happens with the new one

Any help would be appreciated

Are the external hard drives in self-powered enclosures, or do they

need port power to run? You don't specify several items that may be

useful for a reply to be researched; several answers may exist.

Do you have this adapter?

• USB-C Digital AV Multiport Adapter

Sometimes different adapters are required; other times a hub with

options, so you have more ports than the original; and all of them

would need primarily to use USB-C. Including the power adapter.

Not all power adapters will allow the 29W adapter to be in use; so

depending on the choice or availability of other versions, you may

not be able to use the product. Also, not all USB-C to other type

of plug adapters are of equal or reliable quality. Check all to see.

• Using the USB-C port and adapters on your MacBook (Retina, 12-inch, Early 2015) and later - Apple Support

A memory stick does not require power to the degree that rotational

hard disk drives in external enclosures will; so if those external HDD

units have their own power adapter, that should make a difference.

And if so, you may not have had an issue. There may be some other

problem behind the situation you are faced with.

There is a built-in diagnostic test for the computer in its OS X; but

that may not help if the issue is a peripheral adapter problem.

Not sure what else to say...

Good luck in any event. 🙂

Hello,

I have the same problem. I try and connect a GRaid drive ( self powered) and the laptop ( Macbook pro 2017) does not recognize it. If I