Add USB-C ports to an old 2014 iMac

Solution 1:

Actually, Satechi makes an adaptor which will allow you to use your existing Satechi hub with the USB Type-A port on your 2015 iMac. Below is a image taken from the webpage for the adaptor. The image shows your hub connected to an USB Type-A port on an iMac Pro though the adaptor.

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Specical thanks to MacGuffin for pointing out this adaptor. I would not have found this answer without such assistance.

Note: MacGuffin also added the following to this answer.

As there are no such adapters with the proper chip in them there is no simple and cheap solution. You would be best advised to deal with what you have or find a Thunderbolt to USB-C dock, hub, or breakout box. Choices on this are slim and run over $100 in cost.

Any inexpensive adapters for connecting USB-C client devices into USB-A hosts will be passive, and an active adapter is needed. As the USB-IF group did not define how to construct such an active adapter a separate USB controller must be used.

The adapter recommended by David Anderson has been reported as a fire hazard in the Amazon reviews. https://www.amazon.com/Satechi-Type-Type-C-Adapter-Converter/product-reviews/B07KCL8WZK/ref=cm_cr_getr_d_paging_btm_prev_2?ie=UTF8&reviewerType=all_reviews&pageNumber=2

This is an adapter that the USB-IF group declares "potentially unsafe" and "invalid" (whatever that means, nonfunctional maybe?). Do not use this.