Apple to Continue Evaluating GT's Sapphire Production Progress, Looking for New Uses for Arizona Plant - MacRumors
Skip to Content

Apple to Continue Evaluating GT's Sapphire Production Progress, Looking for New Uses for Arizona Plant

sapphire.pngEarlier today, GT Advanced Technologies officially announced its settlement with Apple, which will see the two companies dissolving their partnership, ending their production agreement, and eliminating contractual ties that kept GT from selling its sapphire to other parties.

Under the agreement, GT Advanced will be selling off its remaining sapphire, along with 2,000 sapphire furnaces, with much of the proceeds going to Apple to repay the $439 million loan it provided to get the operation underway.

Apple has now commented on the settlement with GT Advanced, telling Re/code that GT's sapphire manufacturing process simply wasn't ready for production, and that a relationship in the future remains a possibility as the company's sapphire production techniques improve. GT will continue research work focused on creating sapphire boules over 165 kilograms.

Apple also says that it is going to look for other ways to use the Mesa, Arizona facility that it purchased for GT Advanced, which will be unused after GT fully shuts down operations at the end of December

"Apple put a lot of effort into an ambitious new sapphire manufacturing process with GTAT which is not ready for production. We're going to continue evaluating GTAT's progress on larger sapphire boule development, as well as consider other options for the facility. We remain committed to the city and we're going to work with Mesa and Maricopa County to help the GT Advanced employees who will be impacted by this find new jobs."

GT Advanced first filed for bankruptcy at the beginning of October, but the company was reportedly missing technical milestones as early as February, hinting at the trouble to come. While Apple was widely expected to use sapphire from GT Advanced for the iPhone 6 and 6 Plus displays, the company opted to stick with Corning's Gorilla Glass after it became apparent GT would not be able to produce sapphire of the quality that Apple required.

Approximately 650 employees at the Mesa, Arizona sapphire plant have already been laid off, and a limited number of employees will remain employed until the end of the year in order to help GT Advanced wind down production at the factory, finishing the sapphire boules that are currently growing and shutting down and cleaning furnaces for storage and sale.

Popular Stories

iphone 18 pro max prepare

iPhone 18 Pro Max Requires 'Prepare to Ship' Battery Drain Before Shipping

Friday September 18, 2026 4:27 pm PDT by
The iPhone 18 Pro Max has a battery capacity over 20 watt-hours, which means there are additional shipping requirements. If an iPhone 18 Pro Max needs to be shipped somewhere, its maximum battery capacity has to be limited through firmware. According to Apple, the iPhone 18 Pro Max uses an "innovative battery-firmware solution" that limits battery capacity to below 20Wh between when the...
imac video apple feature

Apple Releasing Two New Macs Next Week

Friday September 18, 2026 10:07 am PDT by
Last month, Apple announced new Mac mini and Mac Studio models, and the computers are finally set to launch this coming Tuesday, September 22. The new Mac mini is available with M6 and M5 Pro chip options, while the new Mac Studio can be configured with M5 Max or M5 Ultra chips. To learn more, read our coverage:Apple Announces New Mac Mini With M6 and M5 Pro Chips and More Apple Unveils ...
iphone duo weather

Apple Exec Says 'Hold Us Accountable' on iPhone Duo Crease

Friday September 18, 2026 9:51 pm PDT by
Apple hardware engineering VP Tom Marieb spoke with TechRadar and shared some candid thoughts about Apple's upcoming iPhone Duo. The iPhone Duo uses a matte nano-texture display, which is meant to cut down on glare and minimize the visibility of the crease. When asked if the iPhone Duo's crease would be more visible over time, as that's what tends to happen on other foldables, Marieb said...

Top Rated Comments

Klae17 Avatar
156 months ago
US manufacturing continues to be a joke. First the Mac Pro delays and then this. Anyone who doesn't acknowledge this is blinded.
Score: 10 Votes (Like | Disagree)
156 months ago
Another use for the plant.

Easy answer;

Build Mac minis there. Make them single-core with a maximum 4GB RAM but sexy and thin with a back-lit sapphire Apple logo.

Apple wins on multiple levels with the above plan. It gets to further degrade another product and Jony gets to introduce another stupidly thin product.
Score: 9 Votes (Like | Disagree)
156 months ago
This still doesn't make sense. If the product wasn't good enough for Apple's plans and never was good enough, why did GTAT deploy 2,000 furnaces to prove that?
Score: 8 Votes (Like | Disagree)
156 months ago
Jobs brought more manufacturing jobs to the USA.

Job: Zero manufacturing jobs brought to the USA.
Cook: Minus 700 (or so) jobs brought to the USA.

Cook through this collapse cost many manufacturing workers their jobs.


Ive needs to make himself thin. He is very fat bordering obese now.

You think it was Cook that cost 700 jobs? You also think GTAT had 700 jobs prior to the expansion from Apple? You crazy?
Score: 7 Votes (Like | Disagree)
156 months ago
Who will be the next USA Manufacturer to take this on? Come on Apple giving an opportunity to bring the jobs back from oversea suppliers! Don't screw it up (again)!!
Score: 7 Votes (Like | Disagree)
156 months ago
US manufacturing continues to be a joke. First the Mac Pro delays and then this. Anyone who doesn't acknowledge this is blinded.
It is a joke to people thinking US can make the iPhone or some other large volume product. However if this is a goal than Apple needs to tread even slower than before as GTAT is a perfect example. Imagine building a complete product with multiple US manufacturers? And depending on them. Crazy. Someone else pointed out it would take a decade and I tend to agree that it would take that long to transition manufacturing something like an iPhone to be completely built in the US. There are just no manufacturing plants at such scale in the US. They would literally have to build a new town for this endeavor and also get the people to move their for this type of jobs. Just imagine the costs, the politics involved.

I think small scale is the best we will get for US manufacturing. Mac Pro, TB Displays.. peripherals maybe Mac Mini is about it.
Score: 5 Votes (Like | Disagree)
Latest Stories
New Mac Mini and Mac Studio Launch Tomorrow
New Mac Mini and Mac Studio Launch Tomorrow
26 minutes ago
Apple Watch Series 12 and Ultra 4 May Have Hidden Flash Storage
Apple Watch Series 12 and Ultra 4 May Have Hidden Flash Storage
38 minutes ago
iPhone 20 Pro Display Sizes Leak Ahead of 2027 Launch
iPhone 20 Pro Display Sizes Leak Ahead of 2027 Launch
2 hours ago
Apple Watch Series 12 and Ultra 4 Owners Report Unexpected Reboots
Apple Watch Series 12 and Ultra 4 Owners Report Unexpected Reboots
4 hours ago
iFixit Shares iPhone 18 Pro Teardown With Inside Look at New Features
iFixit Shares iPhone 18 Pro Teardown With Inside Look at New Features
10 hours ago
Apple Fitness+ Layoffs Reported Ahead of Potential 'Major' Changes
Apple Fitness+ Layoffs Reported Ahead of Potential 'Major' Changes
11 hours ago
A Shorter Apple Pencil Was Supposed to Launch Alongside iPhone Duo
A Shorter Apple Pencil Was Supposed to Launch Alongside iPhone Duo
11 hours ago
Siri AI Settlement Website Now Live: Apple to Pay Some iPhone Owners
Siri AI Settlement Website Now Live: Apple to Pay Some iPhone Owners
11 hours ago
M6 Pro Chip Result on Geekbench is Likely Fake
M6 Pro Chip Result on Geekbench is Likely Fake
2 days ago
Apple Watch Ultra 4 Sees First Discount After Launch, Now $779.99 on Amazon
Apple Watch Ultra 4 Sees First Discount After Launch, Now $779.99 on Amazon
2 days ago
Top Stories: iOS 27 and macOS Golden Gate Out Now, Siri AI Waitlist, and More
Top Stories: iOS 27 and macOS Golden Gate Out Now, Siri AI Waitlist, and More
2 days ago
Apple Exec Says 'Hold Us Accountable' on iPhone Duo Crease
Apple Exec Says 'Hold Us Accountable' on iPhone Duo Crease
2 days ago
iPhone 18 Pro Max Requires 'Prepare to Ship' Battery Drain Before Shipping
iPhone 18 Pro Max Requires 'Prepare to Ship' Battery Drain Before Shipping
3 days ago
Hands-On With the Apple Watch Series 12
Hands-On With the Apple Watch Series 12
3 days ago
M5 Ultra and M6 Chip Benchmark Results Reveal Graphics Performance
M5 Ultra and M6 Chip Benchmark Results Reveal Graphics Performance
3 days ago
iPhone 18 Pro Max in U.S. Has Qualcomm's Snapdragon X80 Modem
iPhone 18 Pro Max in U.S. Has Qualcomm's Snapdragon X80 Modem
3 days ago
Apple Releases Xcode 27.1 Beta With iPhone Duo Support
Apple Releases Xcode 27.1 Beta With iPhone Duo Support
3 days ago
Apple Watch Series 12 vs. Ultra 4 Buyer's Guide
Apple Watch Series 12 vs. Ultra 4 Buyer's Guide
3 days ago
MacRumors Giveaway: Win an iPhone Duo From iMazing
MacRumors Giveaway: Win an iPhone Duo From iMazing
3 days ago
'Shop Different': Apple Retail Pioneer Ron Johnson Shares the Inside Story
'Shop Different': Apple Retail Pioneer Ron Johnson Shares the Inside Story
3 days ago
Apple Teams Up With ROSÉ for iPhone 18 Pro Camera Ad
Apple Teams Up With ROSÉ for iPhone 18 Pro Camera Ad
3 days ago
The MacRumors Show: Is the iPhone Duo Actually Worth It?
The MacRumors Show: Is the iPhone Duo Actually Worth It?
3 days ago
Apple Designers Explain the Thinking Behind iPhone Duo
Apple Designers Explain the Thinking Behind iPhone Duo
3 days ago
Are iPhone 17 Pro Cases Compatible With iPhone 18 Pro? Here's What Apple Says
Are iPhone 17 Pro Cases Compatible With iPhone 18 Pro? Here's What Apple Says
3 days ago
Apple Supplier Subsidiary Considering U.S. Flash Memory Factory
Apple Supplier Subsidiary Considering U.S. Flash Memory Factory
3 days ago
Apple Launch Day Deals on iPhone 18 Pro, AirPods 5, Apple Watch Series 12, and More
Apple Launch Day Deals on iPhone 18 Pro, AirPods 5, Apple Watch Series 12, and More
3 days ago
iPhone 18 Pro Teardown Reveals How Apple Shrunk the Dynamic Island
iPhone 18 Pro Teardown Reveals How Apple Shrunk the Dynamic Island
3 days ago
iPhone 18 Pro Demand Stronger Than Expected
iPhone 18 Pro Demand Stronger Than Expected
3 days ago
Fan Site Lets You 'Design the Next iPhone'
Fan Site Lets You 'Design the Next iPhone'
3 days ago
Apple Stores Have a New 'Hello' Easter Egg, Here's Why
Apple Stores Have a New 'Hello' Easter Egg, Here's Why
3 days ago