A Mac is different from an iPhone: it's where work lives. That's why this guide treats the macOS 27 Golden Gate beta with more respect than a casual "tap update" — you'll choose between installing on your main volume or, smarter, on a separate APFS volume that leaves macOS 26 untouched.
Either way, enrollment is the modern kind: your Apple Account unlocks the beta channel in System Settings, and Software Update does the rest.
What you'll need
A supported Mac
Apple silicon Macs from 2020 onward and the MacBook Neo. macOS 27 ends the Intel era — check the compatibility list if your Mac is from 2019–2020.
A current Time Machine backup
Or at minimum a copy of your critical files. Betas and work files don't mix without one.
A free Apple Account
Enrolled at beta.apple.com or developer.apple.com.
30+ GB free disk space
More if you take the separate-volume route (recommended: 60 GB for a comfortable second system).
Step-by-step
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1Back up with Time Machine
Run a full backup to an external disk or NAS. Verify it completed — open Time Machine and confirm today's snapshot exists before touching anything else.
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2Optional but smart: create a beta volume
Open Disk Utility, select your internal drive, click the + button and add an APFS volume named "Beta". APFS shares free space dynamically, so this costs nothing until the OS is installed. You can delete the volume later to reclaim everything.
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3Enroll your Apple Account
Sign up at beta.apple.com (public) or sign in at developer.apple.com (developer). Use the same Apple Account your Mac is signed into.
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4Turn on Beta Updates
System Settings > General > Software Update > click the ⓘ next to Beta Updates > choose macOS 27 Developer Beta or Public Beta. If you created a beta volume, run the full installer and point it at that volume when asked where to install.
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5Upgrade and hold Option at boot to switch
Click Upgrade Now and let the Mac restart. Dual-volume users: hold the power button (Apple silicon) at boot to pick between macOS 26 and Golden Gate any time.
After installing
Launch your five most important apps on day one. If one fails, you'll know while the Time Machine backup is still fresh. Rosetta, drivers and login items sometimes need a re-authorization dance after a major beta.
Troubleshooting
Beta Updates option isn't visible
System Settings > General > Software Update — confirm the Mac's Apple Account matches the enrolled one. On managed Macs, MDM can hide the option entirely.
An app refuses to launch on Golden Gate
Check for a beta-ready update, then try Rosetta reinstall (softwareupdate --install-rosetta) for Intel-era apps. Worst case: run that app on your macOS 26 volume until the developer catches up.
How do I remove the beta completely?
Separate volume: just delete it in Disk Utility. Main volume: back up your files, boot to Recovery, erase, reinstall macOS 26, restore from the Time Machine backup you made before upgrading.
Frequently asked questions
Can I keep macOS 26 and try Golden Gate at the same time?
Yes — that's the separate APFS volume route in step 2, and it's the setup we recommend for anyone who works on their Mac.
Does the beta affect my files?
An in-place upgrade keeps everything, but beta filesystem or app-format changes can be one-way. Files created by beta app versions may not open in older versions.
Is the macOS beta free too?
Yes — same Apple Account enrollment as iOS, no paid membership needed.