Quick Brief
- Apple seeded iOS 18.7.7 RC with build number 22H333 on March 18, 2026
- iOS 18.7.7 is exclusive to iPhone XS, XS Max, and iPhone XR only
- iPadOS 18.7.7 RC targets iPad (7th generation) only, no other iPad models
- iOS 18 is the final iOS version for these devices; iOS 26 drops support for XS and XR
Apple pushed iOS and iPadOS 18.7.7 RC to beta testers on March 18, 2026, carrying build number 22H333. This update covers a very specific set of older devices that iOS 26 has left behind. Here is exactly which hardware qualifies, what the update addresses, and whether you should install it the moment the stable build drops.
iOS 18.7.7 RC: Confirmed Device Support
iOS 18.7.7 RC is restricted to iPhone XS, iPhone XS Max, and iPhone XR only. Starting with iOS 18.7.3 (22H217) in December 2025, Apple formally separated the 18.7.x update track for these three models from the broader iOS tree. Every subsequent release in this series, including 18.7.4, 18.7.5, 18.7.6, and now 18.7.7 RC, has maintained this restriction.
iOS 18 is the last version of iOS that supports the iPhone XS and iPhone XR. Apple confirmed that iOS 26 drops support for these models entirely, making the 18.7.x series the ongoing security maintenance channel for these devices going forward.
iPadOS 18.7.7 RC is restricted to iPad (7th generation) only. The iPadOS 18.7.x branch mirrors the iOS pattern: as of iPadOS 18.7.5, Apple narrowed support to only the iPad 7th gen within this track, and the 18.7.7 RC continues that restriction. iPadOS 18 is the final iPadOS version for the iPad (7th generation).
What the Update Contains
Apple has not published a detailed changelog for the RC build at time of writing. Based on the consistent pattern across the entire 18.7.x series, this update delivers security patches and bug fixes with no new features added. Every build from 18.7.3 onward has maintained this focused, lightweight approach for legacy hardware.
The RC was seeded on March 18, 2026, alongside Release Candidates for iOS 26.4 and macOS 26.4. Shipping both simultaneously signals Apple treats the legacy 18.7.x track and the main iOS 26 branch as parallel maintenance priorities.
iOS 18.7.x Version History (iPhone XS and XR)
| Version | Build | Release Date | Device Scope |
|---|---|---|---|
| 18.7.3 | 22H217 | December 12, 2025 | First build officially iPhone XR and XS only |
| 18.7.4 | 22H218 | January 26, 2026 | iPhone XR and iPhone XS only |
| 18.7.5 | 22H311 | February 11, 2026 | iPhone XR and iPhone XS only |
| 18.7.6 | 22H320 | March 4, 2026 | iPhone XR and iPhone XS only |
| 18.7.7 RC | 22H333 | March 18, 2026 | iPhone XR and iPhone XS only |
iPadOS 18.7.x Version History (iPad 7th Generation)
| Version | Build | Release Date | Device Scope |
|---|---|---|---|
| 18.7.3 | 22H217 | December 12, 2025 | Final build iPad (7th gen) only |
| 18.7.4 | 22H218 | January 26, 2026 | iPad (7th gen) and iPad (8th gen) |
| 18.7.5 | 22H311 | February 11, 2026 | iPad (7th generation) only |
| 18.7.7 RC | 22H333 | March 18, 2026 | iPad (7th generation) only |
Note: There is no iPadOS 18.7.6. Apple’s version history jumps directly from iPadOS 18.7.5 to 18.7.7 RC for the iPad track.
How to Install iOS 18.7.7 on Your Device
The RC is currently available only to users enrolled in Apple’s developer beta or public beta program. Once Apple finalizes the build, the stable release typically follows within a few days of the RC seed.
To install when the public version drops:
- Open Settings on your iPhone XS, XS Max, XR, or iPad (7th generation)
- Tap General, then select Software Update
- If iOS or iPadOS 18.7.7 appears, tap Download and Install
- Keep the device plugged in and connected to Wi-Fi throughout
- Enter your passcode when prompted to finalize the update
Ensure at least 2GB of free storage before starting. Backing up to iCloud before any update is a practical precaution regardless of build maturity.
Should You Install iOS 18.7.7?
For iPhone XS, XS Max, XR, and iPad (7th generation) users, this update represents the latest security baseline Apple provides for your hardware. Since iOS 26 excludes these devices entirely, the 18.7.x series is the only active security coverage available.
Apple has maintained a consistent monthly patch cadence for this device group since December 2025, with builds in January, February, March, and now the 18.7.7 RC in the same month as 18.7.6. That frequency reflects Apple’s continued commitment to keeping these older devices protected even after their main software lifecycle ends.
Limitations and Considerations
iOS and iPadOS 18.7.7 deliver no new features. Users on these devices remain ineligible for Apple Intelligence, which requires iOS 26 on supported hardware. This update extends the security coverage window only. It does not extend the functional lifespan or add capabilities that newer iPhone and iPad models receive.
Frequently Asked Questions (FAQs)
What is iOS 18.7.7 RC build number 22H333?
iOS 18.7.7 RC carries build number 22H333 and was seeded by Apple on March 18, 2026. It is the Release Candidate for the upcoming stable iOS 18.7.7 update, available currently to users enrolled in Apple’s beta program before the public release.
Which iPhones support iOS 18.7.7?
iOS 18.7.7 is exclusive to iPhone XS, iPhone XS Max, and iPhone XR. No other iPhone models receive this update. Newer iPhones are on the iOS 26 track. Starting with iOS 18.7.3, Apple formally restricted the 18.7.x series to these three models only.
Which iPads support iPadOS 18.7.7?
iPadOS 18.7.7 RC is exclusive to the iPad (7th generation) only. No other iPad model receives this specific update. iPadOS 18 is the final version for the iPad 7th gen, making this series its ongoing security maintenance channel.
Is there an iPadOS 18.7.6?
No. Apple’s iPadOS 18 version history skips directly from iPadOS 18.7.5 (22H311, February 11, 2026) to iPadOS 18.7.7 RC (22H333, March 18, 2026). There is no iPadOS 18.7.6 release.
When will iOS 18.7.7 stable release publicly?
Apple seeded the RC on March 18, 2026. Based on Apple’s standard release cadence, the public stable build typically follows within a few days of the RC. An exact public release date has not been confirmed by Apple at the time of writing.
Will iOS 18.7.7 be the last update for iPhone XS and XR?
Apple has not announced an end date for the 18.7.x series. Given the consistent monthly update cadence from December 2025 through March 2026, further security updates remain possible. Apple has not committed to a cutoff point publicly.
Does iOS 18.7.7 add Apple Intelligence?
No. Apple Intelligence requires iOS 26 and supported hardware. iPhone XS, XR, and iPad (7th generation) are not eligible for iOS 26 or Apple Intelligence. The 18.7.x series is a security-only maintenance track with no feature additions.
