A future MacBook with a gigantic folding screen certainly sounds intriguing. And now, a reliable source says such a dream machine might appear on the scene in the next few years.

That's just one of the Apple supply chain rumors simmering away on this President's Day:

• Apple's virtual/augmented-reality headset supposedly entered engineering validation testing, which puts it one step closer to our foreheads.

• iPhone 14 sounds like it's right on schedule, despite a big redesign.

Also today, we've got a how-to/explainer that tells you what the blood oxygen sensor on Apple Watch Series 6 and 7 actually does (and how to get it up and running).

– Lewis Wallace, managing editor

MacBook with 20-inch folding screen sounds like a dream machine — www.cultofmac.com

Apple is reportedly working on a notebook with a display that dwarfs the 16-inch screen in the latest MacBook Pro. And the whole device won’t be gargantuan — because it’ll fold in half.

Apple VR/AR headset takes big step toward production — www.cultofmac.com

Apple is reportedly doing engineering validation tests on its much-rumored VR/AR headset. This is an important milestone in moving the product out of the lab and into production.

iPhone 14 enters trial production right on time — www.cultofmac.com

The move indicates that the lineup’s design has been finalized and Apple is ready to find out whether any issues might arise during manufacturing.

How to use Apple Watch blood oxygen sensor, and what it’s good for — www.cultofmac.com

The blood oxygen sensor featured in Apple Watch Series 6 and 7 is “not intended for medical use,” Apple says. That seems odd, considering that low blood oxygen is a serious medical condition. So what exactly is it for?

Put your Apple Watch to work with this fitness bike that’s $200 cheaper than Amazon’s price — www.cultofmac.com

If you’re into cycling but want to stay in shape without hitting the road, you need a studio-quality exercise bike you can use in your own home. And we’ve got a hot deal on one. You can get the Echelon EX-3 Smart Connect Fitness Bike for $599 (regularly $799) with coupon code ECHELON.

Juice up Apple Watch on the go with this compact travel charger [Review] — www.cultofmac.com

Ampere’s Apple Watch Charging Cable is a lot more portable than Apple’s. With its short cable, it fits easily in a purse or gear bag.

Which Macs will pop out of Apple’s magic pipeline next? [The CultCast] — www.cultofmac.com

This week on Cult of Mac’s podcast: Thanks to regulatory filings, we know that new MacBooks are coming soon. Now, the only question is … just exactly what Macs should we expect at Apple’s rumored March event? (We know what we want.)

Drool-worthy gear: Former PC gamer goes all-in on Mac conversion [Setups] — www.cultofmac.com

When a software engineering manager who works from home decided to leave PC gaming behind, he pulled out all the stops. His setup features a super-tricked-out 16-inch M1 Max MacBook Pro, not one but two Apple Pro Display XDRs, and pretty much top-shelf everything else.

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One more thing ...

"The president is very smart, but he kept explaining to us reasons why things can't get done. It infuriates me." – Steve Jobs on meeting with President Barack Obama