Apple Silicon vs Intel Macs: What’s the Difference and Which Do You Have?

Every Mac sold since late 2020 runs one of two processor architectures: Apple’s ARM-based Apple Silicon (M1 through M5) or Intel x86_64. The chip decides which macOS version you can install, which apps run natively, how long the battery lasts, and whether you can boot Windows. You can identify yours in about ten seconds with the GUI or one Terminal command.

Quick Takeaways

• Fastest check: Apple menu → About This Mac. “Chip: Apple M-series” means Apple Silicon. “Processor: Intel Core…” means Intel.
• Terminal check: uname -m returns arm64 on Apple Silicon and x86_64 on Intel.
• Support cutoff: Intel Macs won’t get macOS 27, and macOS Tahoe 26 is the last version to support any Mac with an Intel processor.
• Biggest practical gaps: Apple Silicon wins on battery life, thermals, and unified memory. Intel still offers native Boot Camp and eGPU support.

Method 1: Identify Your Chip in About This Mac

1. Click the Apple menu in the top-left corner.
2. Select About This Mac.
3. Read the Chip or Processor line.

Click More Info… (or System Settings → General → About) for the model year and serial number.

Method 2: Check With Terminal Commands

Terminal gives you copy-pasteable proof, which helps when you script installers or write support runbooks. Open /Applications/Utilities/Terminal.app.

Check the machine architecture

uname -m

uname -m prints the hardware architecture. arm64 is Apple Silicon. x86_64 is Intel.

Read the CPU brand string

sysctl -n machdep.cpu.brand_string

sysctl -n prints the value without the key name. Apple Silicon returns something like Apple M3 Pro. Intel returns the full Core or Xeon string.

Pull the full hardware profile

system_profiler SPHardwareDataType

SPHardwareDataType limits the report to hardware. Apple Silicon Macs list Chip and Total Number of Cores. Intel Macs list Processor Name and Processor Speed.

Confirm the ARM feature flag

sysctl -n hw.optional.arm64

This returns 1 on Apple Silicon. On Intel it returns an error or 0.

Check the kernel build string

uname -v

The XNU kernel string ends in RELEASE_ARM64_T… on Apple Silicon and RELEASE_X86_64 on Intel. Both architectures run the same XNU/Darwin base. Only the build target differs.

Method 3: Check If a Terminal Session Runs Under Rosetta

A shell can report x86_64 on an Apple Silicon Mac if it launched under translation. This catches many developers off guard.

sysctl -n sysctl.proc_translated

Check the shell’s architecture directly:

arch

If arch prints i386 on a known M-series Mac, your Terminal or iTerm is set to “Open using Rosetta.” Right-click the app in Finder → Get Info and clear Open using Rosetta.

Apple Silicon vs Intel: Architecture Differences

CPU design

Intel Macs use x86_64 processors built on a CISC instruction set. Apple Silicon uses ARM64 with a RISC design. Apple’s M5 Pro and M5 Max renamed their performance cores. Performance cores became “Super Cores,” a naming that also applies retroactively to the base M5.

Unified memory

Apple Silicon places CPU, GPU, and Neural Engine on one package sharing a single memory pool. The GPU reads the same RAM the CPU writes, with no copy across a PCIe bus. Intel Macs with discrete AMD GPUs keep separate VRAM. That is why a 16 GB Apple Silicon Mac can feel faster than a 16 GB Intel Mac in video and ML workloads.

Boot process

Performance and battery

Apple Silicon delivers more work per watt. Fanless designs like the MacBook Air stay cool under sustained workloads that push Intel laptops to thermal throttle. Expect all-day battery life from M-series laptops, where Intel Macs typically fell short.

macOS Support: Why Your Chip Matters Now

This is the most important practical difference today.

The 2019 16-inch MacBook Pro and Mac Pro, plus the 2020 13-inch MacBook Pro and iMac with Intel chips, are the supported Intel models. All Intel MacBook Air and Mac mini models are not supported. Per Engadget, Intel Macs will get security updates for the next three years. That timeline points to fall 2028, when macOS 28 arrives. Plan hardware replacement around that date.

Rosetta 2 has an expiration date

Rosetta 2 keeps working on macOS 26 Tahoe and macOS 27. Starting with macOS 28, it will support only a subset of apps, including older games that depend on Intel-specific libraries. If you rely on legacy x86 software on an Apple Silicon Mac, start testing native alternatives now.

Check Whether Apps Run Natively or Under Translation

Activity Monitor

1. Open Activity Monitor (Spotlight → “Activity Monitor”).
2. On the CPU tab, find the Kind column.
3. Apple means native ARM64. Intel means translated through Rosetta 2.

Terminal: inspect a binary

file /Applications/Safari.app/Contents/MacOS/Safari

file reports the Mach-O architecture. A universal binary shows both x86_64 and arm64.

lipo -archs /Applications/Slack.app/Contents/MacOS/Slack

lipo -archs lists every slice in a fat binary. Output of x86_64 arm64 means a universal app. Output of only x86_64 means the app needs Rosetta on an M-series Mac.

Install and Verify Rosetta 2

Run this on an Apple Silicon Mac when an app reports a missing translation layer:

softwareupdate --install-rosetta --agree-to-license

--install-rosetta fetches the translator. --agree-to-license skips the interactive prompt, which is useful for MDM and automation scripts.

Verify it is active:

pgrep -q oahd && echo "Rosetta is running" || echo "Rosetta not running"

oahd is the Rosetta daemon. pgrep -q returns silently with an exit code you can test.

Force a single command to run as Intel:

arch -x86_64 zsh

arch -x86_64 launches the child process under translation. Use this to test whether a tool breaks only on ARM.

Troubleshooting Real-World Scenarios

Scenario 1: “Bad CPU type in executable”

This error means you ran an x86_64-only binary on a Mac without Rosetta, or an ARM64-only binary on an Intel Mac.

1. Identify the binary’s architecture: lipo -archs /path/to/binary
2. On Apple Silicon with an x86-only binary, install Rosetta (command above).
3. On Intel with an ARM-only binary, download the x86_64 or universal build. No translation layer exists on Intel.

Scenario 2: Homebrew installed in the wrong prefix

Homebrew uses /opt/homebrew on Apple Silicon and /usr/local on Intel. A Mac migrated from Intel often keeps the old Rosetta install and runs slowly.

which brew
brew config | grep -E "HOMEBREW_PREFIX|Rosetta"

If HOMEBREW_PREFIX shows /usr/local on an M-series Mac, you are on the Intel install. Install a native copy in /opt/homebrew, then add it to your shell profile:

echo 'eval "$(/opt/homebrew/bin/brew shellenv)"' >> ~/.zprofile

Scenario 3: Python wheel architecture mismatch

The error looks like incompatible architecture (have 'x86_64', need 'arm64'). It happens when a Python or compiled library was built for the other architecture.

python3 -c "import platform; print(platform.machine())"
file $(which python3)

If the interpreter is x86_64 on an M-series Mac, reinstall a native arm64 Python and recreate the virtual environment:

rm -rf .venv && python3 -m venv .venv && source .venv/bin/activate
pip install --force-reinstall --no-cache-dir -r requirements.txt

Scenario 4: Docker image won’t start on Apple Silicon

Many older images only publish linux/amd64. Force emulation explicitly:

docker run --platform linux/amd64 your-image:tag

--platform tells Docker to pull the x86 image and run it under QEMU or Rosetta emulation. Expect slower performance. Prefer images with a linux/arm64 manifest where possible.

Scenario 5: Kernel extension or driver won’t load

Many Intel-era kext drivers (USB-to-serial adapters, old VPN clients, virtualization tools) fail on Apple Silicon. Look for a DriverKit or System Extension replacement from the vendor. On an M-series Mac, check System Settings → Privacy & Security for a blocked-extension prompt and approve it.

Which Should You Buy or Keep?

Apple’s silicon transition began in 2020, and the line is now deep into its fifth generation. The MacBook Air moved to M5 on March 3, 2026, joining a MacBook Pro first shipped with that chip in October 2025. If your Mac is Intel and can’t run macOS 27, treat it as a machine on a countdown to the end of security updates.

Frequently Asked Questions

How do I know if my Mac is Intel or Apple Silicon?

Open the Apple menu and choose About This Mac. A Chip line naming an Apple M-series processor means Apple Silicon. A Processor line naming an Intel Core or Xeon means Intel. In Terminal, uname -m prints arm64 or x86_64.

Will my Intel Mac still get updates?

Yes, for security fixes. Intel Macs that run macOS 26 Tahoe will keep receiving security updates until around fall 2028, but they won’t get feature upgrades to macOS 27 or later.

Can Apple Silicon Macs run Intel apps?

Yes. Rosetta 2 translates x86_64 apps to ARM64 on the fly. Install it with softwareupdate --install-rosetta --agree-to-license. Rosetta stays fully available through macOS 27, then narrows to a limited set of legacy apps, including older games.

Can I run Windows on an Apple Silicon Mac?

Not through Boot Camp. Apple Silicon Macs run Windows on ARM inside a virtual machine using tools such as Parallels Desktop or VMware Fusion. Intel Macs can still dual-boot Windows natively with Boot Camp.