Apple’s macOS Sequoia 15.5 Release Candidate has arrived as the final preview build ahead of the public launch. It’s primarily intended to iron out last-minute issues and polish performance. While it’s close to the finished product, this RC version still comes with a handful of frustrating bugs that could disrupt your daily workflow. If you’ve installed macOS Sequoia 15.5 RC on your Mac, you may have already encountered some of these annoyances. In this article, I’m going to talk about the 5 most annoying bugs in macOS Sequoia 15.5 Release Candidate (RC) and their possible solutions.
1. Mission Control Freezing or Lagging
After updating to macOS Sequoia 15.5 RC, some users report that Mission Control becomes unresponsive or freezes intermittently. This makes it difficult to switch between apps or virtual desktops, especially during multitasking.
- It’s worth noting that restarting the Dock process may temporarily fix the issue. To do so, open Terminal and run:
killall Dock - Disabling and re-enabling “Displays have separate Spaces” under System Settings > Desktop & Dock may help stabilize Mission Control.
2. Bluetooth Accessories Disconnecting Randomly
Several testers have experienced issues where Bluetooth accessories like keyboards, mice, or headphones randomly disconnect or lag—particularly after waking the Mac from sleep.
- Remove and re-pair the affected Bluetooth devices under System Settings > Bluetooth.
- Reset the Bluetooth module by pressing Shift + Option, clicking the Bluetooth icon in the menu bar, and choosing Reset the Bluetooth module.
- Ensure your Mac’s firmware and drivers are up to date.
3. Sluggish Spotlight Search
Spotlight search has become sluggish for some users in macOS Sequoia 15.5 RC. Indexing delays and unresponsive search results are among the top complaints.
- Rebuild the Spotlight index by navigating to System Settings > Siri & Spotlight > Spotlight Privacy.
- After that, add your system drive and then remove it to force reindexing.
- Bear in mind that this process may take a while, but typically restores normal search speeds afterward.
4. External Displays Not Detected Properly
macOS Sequoia 15.5 RC has display detection issues, particularly with USB-C or Thunderbolt-connected external monitors. Users report blank screens, incorrect resolutions, or frequent disconnections.
- Disconnect and reconnect the display or try a different port.
- Reset NVRAM/PRAM and the SMC (for Intel Macs).
- On Apple Silicon Macs, restart into safe mode to clear any temporary caches affecting display output.
5. Stage Manager Layout Glitches
Stage Manager occasionally misplaces windows or fails to display previews in the left-side strip. This undermines its usefulness for multitasking.
- Toggling Stage Manager off and on again in Control Center > Stage Manager often resolves the visual glitch temporarily.
- If persistent, try logging out and back in or restarting your Mac.
Wrapping up…
And that’s about it! While macOS Sequoia 15.5 RC brings promising improvements, these lingering bugs remind us that pre-release software isn’t always smooth sailing. From Bluetooth disconnects to Spotlight slowdowns and display headaches, these issues may interfere with your productivity.
If you’re already on the RC version, try the suggested workarounds above. Otherwise, you may want to wait for the final public release, where Apple typically rolls out last-minute fixes.
