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I completed the data transfer using the migration assistant. I can tell that not all the pictures transferred though. I was told from support that I would have to do it manually. So, I bought a USB drive and now realized that the new iMac does not have the same USB port so I am back at square one. This is the cable that Apple recommends: USB-C Digital AV Multiport Adapter
$69.00. Any other suggestions?
iMac 24″, macOS 12.2
You do not need that expensive multi-port adapter.
If you have a USB-A external drive that plugs into the old iMac. Then you just need a USB-C to USB-A adapter to plug that external drive into the new iMac.
https://www.target.com/p/philips-6-34-usb-c-to-usb-3-1-female-adapter-black/-/A-53245266
https://www.target.com/p/apple-usb-c-to-usb-adapter-6-1in/-/A-54031722
You do not need that expensive multi-port adapter.
If you have a USB-A external drive that plugs into the old iMac. Then you just need a USB-C to USB-A adapter to plug that external drive into the new iMac.
https://www.target.com/p/philips-6-34-usb-c-to-usb-3-1-female-adapter-black/-/A-53245266
https://www.target.com/p/apple-usb-c-to-usb-adapter-6-1in/-/A-54031722
Well, your 2015 iMac has Thunderbolt 2 and your 2021 iMac has Thunderbolt 3 so if you wanted to do it via Thunderbolt you’d need a TB 3 to 2 adapter… your 2015 iMac has usb 3 and so does your 2021 iMac but in the form of USB-C … so you’d need a usb-c to usb 3.0 adapter which is cheap enough or you could use Ethernet as both of your iMacs have them … turn on file sharing on both iMacs and connect an Ethernet cable between them… just for file sharing it should be OK.. you don’t necessarily need usb-c charging or an hdmi video output… at least not YET… Thunderbolt 3 to 2 adapter adapters tend to be pricey…and just for data transfer only.. kinda iffy… i’d lean towards the usb-c to usb 3.0 adapter or the Ethernet cable
john b
I went to Best Buy but couldn't locate a cable like this. It sure would have made it easier if there was some sort of transfer cable provided by Apple. It is going to take a long time doing it this way. Apple Phone support has been pretty worthless for me. This thread really helped me.
You are attempting your migration the hard way, please follow the directions in Setup Assistant and Migration Assistant and your migration will be complete and totally smooth.
I was able to buy a USB-C to USB-A adapter today. Thank you for your answer. I am now able to transfer the photos and documents that didn't make it when I did the Migration.
You’re welcome.
transferring data from 2015 iMac to a new 2021 iMac
