Explain It in 30 Seconds
A conventional device company can buy a processor from another company.
Apple increasingly does this instead:
Apple defines product
↓
Apple defines OS / feature requirements
↓
Apple designs SoC / silicon
↓
foundry fabricates
↓
Apple integrates silicon into productThe strategic benefit is control over:
- performance;
- performance per watt;
- graphics;
- media;
- security;
- AI accelerators;
- product timing.
The strategic dependency is:
advanced foundry capacityApple Silicon is therefore a textbook example of selective vertical integration.
Where It Sits in Apple
The chip team sits upstream of several products at once.
The A-Series Created the Capability
Apple built custom mobile processors for iPhone / iPad before moving Mac to its own chips.
The early mobile problem was especially demanding because the device needed:
high performance
+
low power
+
small thermal envelopeThat created years of internal learning.
The M-Series Expanded the Platform
In 2020 Apple announced the Mac transition from Intel to Apple Silicon. [S18]
The decision made the internal chip program much broader.
Mac now joined the same general architecture family used across Apple's other products.
This created more reuse.
Performance per Watt
Apple explicitly emphasized performance per watt in the Mac transition. [S18]
Why?
Because better efficiency can improve:
- battery life;
- thermals;
- enclosure design;
- sustained performance.
In consumer devices, energy efficiency is a product feature.
Silicon and AI
Custom silicon gives Apple control over local AI execution.
Neural Engines and related accelerators can support:
- image processing;
- speech;
- Apple Intelligence;
- local models.
That makes AI another reason internal processor design matters.
Silicon Beyond CPU
Apple's internal hardware technology work spans more than CPU cores.
Johny Srouji's organization covers technologies including:
- silicon;
- cellular;
- displays;
- cameras;
- sensors;
- batteries. [S8]
The broader pattern is moving strategically important component knowledge closer to Apple.
What It Depends On
Foundries
Apple requires advanced semiconductor fabrication.
Packaging
High-performance chips also depend on packaging and memory integration.
EDA / semiconductor ecosystem
Apple still relies on industry tools and IP ecosystems.
Materials / equipment supply
Apple's foundry partners depend on a large upstream semiconductor supply chain.
What Depends on Apple Silicon
- iPhone;
- Mac;
- iPad;
- Apple Watch;
- Vision Pro;
- Apple Intelligence;
- Private Cloud Compute.
That breadth increases the return on internal silicon design.
Why It Matters to Apple
Apple Silicon adds another layer of integration.
Earlier Apple:
hardware + softwareModern Apple:
silicon + hardware + softwareThis makes it possible to optimize across boundaries.
The Dependency Did Not Disappear
Moving Mac away from Intel did not make Apple independent.
It changed the dependency.
OLD
external CPU supplier
NEW
internal chip design
+
external foundry manufacturingThis distinction is essential.
What Most People Misunderstand
"Apple is now a chip manufacturer."
No.
It is a major chip designer and customer of foundries.
"Apple Silicon means M-series only."
No.
The capability spans multiple chip families and products.
"Custom silicon removes supplier risk."
No.
Foundry and semiconductor supply-chain risk remain.
Common Questions
Why did Apple design its own chips?
To align processor architecture more closely with product and software needs.
Who manufactures Apple-designed processors?
External foundries, with TSMC a key partner.
Why did Mac move away from Intel?
Apple cited performance per watt and common architecture among the reasons. [S18]
Evidence
Connected Entities
- Apple
- iPhone
- Mac
- Apple Watch
- Apple Intelligence
- Johny Srouji
- How Apple Built Its Own Silicon Stack