No extension cord comes with new Mac.

Apple stopped including the extension cord a few years ago, but old ones do work with current adapters and Apple still sells the extension cord separately. Personally, I have around a dozen of the extension cords from prior Macs (even one from an old FireWire iPod), and I am using several of them with older MagSafe and current USB-C chargers.

If you have an old one that's not working, it may have been damaged.

scotpondonyahoo wrote:

The Macs use the new USB-C charging cord

This is a true statement. Refer to the screenshot below.

https://www.apple.com/macbook-pro-16/specs/

Perhaps you should start from the beginning. Describe the assistance you are seeking.

scotpondonyahoo wrote:

I tried using old one. It doesn’t work with Apple C cable BUT it does work if I use a different brand C cable. What’s up?

I have had no issue using a older 3 prong extension from an older magsafe charger block to the new USBC charger block?

What could the issue be....(?)

Power Adapter Extension Cable - Apple

If you mean the Apple Power Adapter Extension Cable, the 'duckhead' connector at the charger-side of that has not changed in ~2 decades.



My Touch Wheel iPod from 2002 came with one for it's included FireWire charger, and that power extension cord works perfectly with the 96 W charger for my 16" MacBook Pro.

As stated, if your old Power Adapter Extension Cable is not working with your current adapter, the cable is damaged or broken.

Here's a picture of the cable-organizing/concealing box sitting under my desk at home, in there are five Apple notebook chargers ranging from a 60 W MagSafe from a 2008 MacBook to a 96 W USB-C from my 2019 16" MBP.

Two of them are MagSafe, three are USB-C. All have the same type Power Adapter Extension Cable, and since I've never bought one separately, they all came with a Mac or iPod...meaning must all be older than 2015 when Apple stopped including them (in fact, the newest one of mine is from the 17" MacBook Pro that I bought in 2011, and some are much older than that as you can guess from the aged gray color of some of them).

Your image shows only two extension cords. An extension cord has a plug on one end and receptacle (or more than one) for that same plug type on the other end. I think your lack of clarity on the types of cords we're discussing is a big part of the problem.

• Apple Power Cables (for portable AC adapters) from OWC:

https://eshop.macsales.com/shop/accessories/cables/apple-power-cables

When in stock, may be new; or tested good and noted as such.

Site shows two 1.8M official Apple power cables, per question.

Both new. This reputable Mac vendor has other useful things.

1.8 Meter (72") Apple Genuine AC Power Cable. Bulk Packaged $6.79

1.8 Meter (72") Apple Genuine AC Power Cable (not bulk) $7.75

While perusing second-hand stores, I'm almost always on lookout

for extra accessories such as these official Apple cables, & adapters.

Most of mine were only 50 cents and appeared unused. And fit.

"Sorry, but that is not the solution. I have tried plugging the block into two different extension cords. It does not work. I don't get power unless I plug the block into the wall socket."

Then your extension cord is damaged. I use an extension cord every day and have done so for years.