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Apple’s relationships with Intel and TSMC are not the same kind of partnership. Intel supplied processors for Macs before Apple began moving selected models to Apple silicon in late 2020, and Apple separately acquired most of Intel’s smartphone modem business in 2019. TSMC’s documented role is different: it manufactures Apple-designed chips, including production at its Arizona facility, while a later Apple–TSMC–Bosch project covers sensing-hardware circuits.
The distinction matters because “who makes Apple chips” can mean three different things: who designs the silicon, who owns or develops modem intellectual property, and which company fabricates finished wafers. The announcements and support documents establish different answers for each relationship, but they do not provide a complete list of Apple suppliers, current contract terms, wafer volumes or manufacturing yields.
The short answer: Intel was a historical Mac supplier and modem-technology source; TSMC is a manufacturing partner
Intel appears in Apple’s story in two separate contexts. First, Intel processors powered Mac computers during the period before Apple’s transition to its own Apple silicon. Apple Support says certain Mac models introduced in late 2020 began that transition; it does not say every Mac changed at once or that all Intel-based Macs disappeared immediately. You can see Apple’s wording in its list of Mac computers with Apple silicon.
Second, on July 25, 2019, Apple announced an agreement to acquire the majority of Intel’s smartphone modem business. That transaction brought approximately 2,200 Intel employees, intellectual property, equipment and leases to Apple for a stated value of $1 billion. Apple said the combined modem portfolio would contain more than 17,000 wireless-technology patents. Intel retained the option to develop modems for non-smartphone uses such as PCs, Internet of Things devices and autonomous vehicles. This was therefore an acquisition of most of a specific business, not every Intel modem activity.
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TSMC enters the picture primarily as a foundry. In February 2025, Apple described a multibillion-dollar commitment to produce advanced silicon at TSMC’s Fab 21 in Arizona. Apple called itself the facility’s largest customer and said mass production of Apple chips had begun the previous month. Those facts support describing TSMC as a manufacturing partner, not as the designer of Apple’s processors.
Apple announced another, narrower collaboration on March 26, 2026: Apple, Bosch and TSMC would produce integrated circuits for Bosch sensing hardware at TSMC Washington in Camas, Washington. Apple said the circuits are essential to features including Crash Detection, Activity tracking and elevation. That project should not be read as proof that every such circuit is an Apple-designed main processor.
What Intel did for the Mac before Apple silicon
Intel supplied the Mac’s central processors
For years, Mac computers used Intel processors as their application processors. In practical terms, Intel supplied the central computing chips while Apple built the surrounding computer, operating system and product design. This is the relationship most people mean when they ask why Apple “stopped using Intel chips” in Macs.
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1Repair Windows errors before they cause bigger problems2Scan for outdated or missing drivers - takes under a minute3Clear out junk files and repair common Windows errorsApple’s transition to Apple silicon started with certain Mac models introduced in late 2020, according to Apple Support. The wording is important: it describes a staged product transition rather than a single date on which every Mac changed. Some Intel-based Macs consequently remained in the product line or in active use after the first Apple-silicon models appeared. The support page is a model-by-model reference, not a statement that every Intel relationship ended simultaneously.
Why the transition does not explain the modem deal
The Mac processor transition and the 2019 smartphone-modem acquisition happened for different reasons and involved different assets. A Mac application processor is the primary computing engine in a computer. A smartphone modem handles cellular communications. The fact that both developments involved Intel does not make them one transaction, and neither announcement establishes that Intel supplied the same technology to Apple in both roles.
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Apple’s support documentation identifies when selected Macs began moving to Apple silicon, while the 2019 acquisition announcement identifies a modem business, its employees and associated assets. Treating the two events as a single “Intel exit” obscures what Apple actually bought and when each product category changed.
What Apple acquired from Intel in 2019
The scope was the majority of Intel’s smartphone modem business
Apple’s July 25, 2019 announcement says it would acquire the majority of Intel’s smartphone modem business. The announcement describes the package as including approximately 2,200 employees, intellectual property, equipment and leases, with a transaction value of $1 billion. Intel issued its own release the same day, using the same scope and explaining that it would retain the ability to develop modems for non-smartphone applications.
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Read the primary announcements for the exact transaction language: Apple’s announcement and Intel’s announcement.
What came with the transaction
- People: approximately 2,200 Intel employees were expected to join Apple.
- Technology: intellectual property and modem technology associated with the acquired business.
- Physical and contractual assets: equipment and leases were included in the description.
- Patent position: Apple said the acquired patents combined with its existing portfolio to total more than 17,000 wireless-technology patents.
- Stated value: $1 billion, as reported in Apple’s 2019 announcement.
These figures belong to the 2019 announcement. They are not audited current headcount, a current valuation of Apple’s modem portfolio or evidence of present production volume. Intel’s retained non-smartphone options also mean the deal should not be described as Apple acquiring every modem capability Intel had.
How the companies described the deal
Intel CEO Bob Swan said in the 2019 announcement: “This agreement enables us to focus on developing technology for the 5G network while retaining critical intellectual property and modem technology that our team has created.” That is Intel’s stated rationale at the time, not an independent evaluation of how the strategy performed later.
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Apple senior vice president of Hardware Technologies Johny Srouji said: “We’ve worked with Intel for many years and know this team shares Apple’s passion for designing technologies that deliver the world’s best experiences for our users.” This was Apple’s description of the incoming team and transaction in 2019; it does not establish a future product timetable or guarantee a particular modem release.
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TSMC’s documented role is fabrication
A semiconductor designer can create a chip’s architecture, logic and physical layout without owning the factory that turns that design into wafers. A foundry supplies the manufacturing process, equipment and production capacity. In the evidence available here, Apple is the silicon designer and TSMC is the manufacturer for the cited production relationship.
On February 24, 2025, Apple said it had a multibillion-dollar commitment to produce advanced silicon at TSMC’s Fab 21 in Arizona. Apple described itself as the facility’s largest customer, reported that the site employed more than 2,000 workers and said mass production of Apple chips had begun in January 2025, the preceding month. The announcement appears in Apple’s U.S. investment release.
“Made at TSMC” therefore answers a manufacturing question. It does not mean TSMC designed Apple’s application processors, owns Apple’s chip architecture or controls Apple’s product roadmap. Conversely, Apple’s design role does not mean every Apple chip is fabricated at the Arizona facility. The announcement names one facility and one commitment; it is not a comprehensive supplier or location list.
The Arizona announcement has a specific time and scope
The reported multibillion-dollar commitment, more-than-2,000-worker figure and January 2025 start of mass production are dated statements from Apple’s February 2025 release. They should not be converted into a current contract value, current headcount or annual wafer total. The source also does not state that all Apple silicon, all generations or all regions are produced there.
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A separate Apple–TSMC–Bosch sensing project
Apple’s March 26, 2026 announcement adds another example of the relationship, but it concerns sensing hardware rather than the main processor in a Mac or phone. Apple, Bosch and TSMC planned to produce integrated circuits for Bosch’s sensing products at TSMC Washington in Camas, Washington. Apple said those circuits are essential to functions including Crash Detection, Activity tracking and elevation.
The project illustrates why “Apple chip” is an imprecise label. A product can contain a primary application processor, connectivity silicon and specialized sensing circuits, each with different design, ownership and manufacturing arrangements. The Bosch project confirms a collaborative manufacturing program for specified integrated circuits; it does not establish that all of those circuits are designed by Apple or that they replace the role of an Apple silicon system-on-chip.
Apple’s announcement is available at Apple adds new partners to its American Manufacturing Program.
Intel and TSMC compared directly
| Question | Intel relationship | TSMC relationship |
|---|---|---|
| Primary role established by the cited documents | Historical Mac processor supplier; source of most of Intel’s smartphone modem business acquired by Apple in 2019 | Manufacturer or foundry for Apple chips at named facilities; participant in a separate sensing-circuit project with Apple and Bosch |
| Key period | Mac transition to Apple silicon began with certain models introduced in late 2020; modem transaction announced July 25, 2019 | Arizona advanced-silicon announcement February 24, 2025; Bosch sensing collaboration announced March 26, 2026 |
| What changed hands | For the modem deal: employees, intellectual property, equipment and leases tied to the majority of Intel’s smartphone modem business | Manufacturing capacity and production at named TSMC facilities; no transfer of TSMC ownership of Apple’s designs is stated |
| Geographic or facility scope named | Intel’s smartphone modem business and the Mac processor supply relationship; no complete current supplier map is provided | TSMC Fab 21 in Arizona; TSMC Washington in Camas for Bosch sensing circuits |
| What the evidence does not establish | It does not establish current Intel contract status, that Intel manufactures current Apple application processors, or that Apple acquired every Intel modem activity | It does not establish that TSMC designs Apple silicon, makes every Apple chip, or that all production occurs in Arizona |
How design, modem IP and manufacturing fit together
Design ownership
Apple can specify and design a processor or modem while contracting a foundry to fabricate it. Design includes architecture, functionality, integration and validation decisions. The cited Apple announcements describe Apple’s hardware-technology organization and its silicon production commitments, while identifying TSMC as the manufacturing site. They do not transfer Apple’s design ownership to TSMC.
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Modem intellectual property
The 2019 transaction addressed a business that developed smartphone modem technology. Intellectual property is not the same thing as a factory. Acquiring patents, employees and equipment gave Apple control of the acquired assets described in the announcement; it did not make Intel the continuing manufacturer of Apple’s future modems, nor did it make TSMC the owner of that modem IP.
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Wafer fabrication
Fabrication turns an approved chip design into physical wafers through a semiconductor process. A foundry such as TSMC can manufacture designs from a customer without becoming the chip’s designer. This is the key to interpreting the Arizona announcement: TSMC’s contribution is production at a specified fab, while Apple remains responsible for the product and design decisions attributed to it in the announcements.
A timeline of the relationships
- Before late 2020: Intel processors were used in Mac computers.
- July 25, 2019: Apple announced its $1 billion agreement to acquire the majority of Intel’s smartphone modem business, including approximately 2,200 employees and associated assets. Intel said it would retain non-smartphone modem options.
- Late 2020: Apple began transitioning certain Mac models to Apple silicon, according to Apple Support. The change was staged by model.
- January 2025: Apple said mass production of its chips had begun at TSMC’s Arizona facility, as reported in its February 2025 announcement.
- February 24, 2025: Apple described its multibillion-dollar Arizona commitment, called itself TSMC Fab 21’s largest customer and reported more than 2,000 workers at the facility.
- March 26, 2026: Apple announced the Apple–Bosch–TSMC sensing-circuit project at TSMC Washington in Camas.
Common misunderstandings and the precise correction
“Apple bought Intel.”
Apple announced the acquisition of the majority of Intel’s smartphone modem business, not Intel as a whole. Intel retained non-smartphone modem development options, including areas such as PCs, IoT devices and autonomous vehicles.
“TSMC designs Apple’s processors.”
The cited evidence supports calling TSMC a manufacturer or foundry for Apple chips. It does not identify TSMC as the designer of Apple silicon.
“Apple stopped using Intel everywhere in 2020.”
Apple’s support language says certain Mac models introduced in late 2020 began the Apple-silicon transition. That is a staged product change, not proof that every Mac changed on the same day or that every Intel-related business relationship ended then.
“All Apple chips are made in Arizona.”
Apple named TSMC Fab 21 in Arizona for a multibillion-dollar advanced-silicon commitment and reported production there. The announcement does not claim that every Apple chip or every generation is made at that facility.
“The Bosch project proves Apple designs every sensor chip.”
The 2026 announcement concerns integrated circuits for Bosch sensing hardware and names TSMC Washington as the production location. It does not assign design ownership for every circuit or equate those parts with Apple’s main processors.
What remains unknown from these announcements
These sources are enough to distinguish the relationships, but not to build a complete map of Apple’s supply chain. They do not provide current Intel contract status beyond the historical Mac transition, a full list of Apple foundries, wafer volumes, yields, product-by-product manufacturing locations or current commercial terms. They also do not show that the Arizona facility has replaced every other production site.
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The safest interpretation is therefore role-based: Intel supplied Mac processors in the pre-transition era and transferred most of a smartphone modem business to Apple in 2019; Apple silicon is Apple’s product and design platform; and TSMC manufactures specified Apple chips and participates in a separate sensing-hardware program. Keeping those roles separate prevents a historical supplier relationship, an intellectual-property acquisition and a foundry contract from being treated as one event.
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