TWRP提示无系统安装，摩托罗拉Moto G5刷入文件报错求助

Hey Simon, let's work through your issues step by step based on your device details:

• Device: Motorola Moto G5 16GB (Cedric)
• Firmware: Official Android 7.0
• Recovery: TWRP 3.2.1-0 (previously 3.1.0-0)
• Bootloader: Unlocked
• Root: Magisk v15.0
• Core Issues: Regular Xposed installer fails; TWRP throws Error 1 "no /system partition" when flashing zips; exit warning "No OS installed, are you sure you w..."

Core Problem Breakdown #

The main issue here is TWRP failing to properly detect or mount your /system partition. This breaks zip flashing and triggers the false "No OS installed" warning—likely due to compatibility quirks with the newer TWRP 3.2.1-0 on your Cedric device.

Step 1: Fix TWRP Partition Detection #

Let's get your /system partition recognized correctly first:

1. Check Mount Status in TWRP
   Boot into TWRP, tap the Mount menu, and make sure the /system checkbox is ticked. If it's greyed out or won't mount, move to the next step.
2. Roll Back to TWRP 3.1.0-0
   Your older TWRP version worked without this issue, so flashing it back should resolve the partition glitch:
   • Boot your device into fastboot mode
   • Run the command: fastboot flash recovery twrp-3.1.0-0-cedric.img (replace the filename with your actual TWRP image)
   • Reboot directly into recovery to confirm /system mounts properly
3. Re-Flash Official Firmware (If Needed)
   If rolling back TWRP doesn't help, your /system partition might be corrupted. Re-flash the official Android 7.0 firmware for Cedric, then re-unlock the bootloader, re-flash TWRP, and re-root with Magisk v15.0 to reset partitions to a clean state.

Step 2: Install Xposed Framework Correctly #

With TWRP accessing /system properly, let's get Xposed working with your Magisk setup:

1. Download the Right Xposed Build
   For Android 7.0 (SDK 24) on arm architecture (Moto G5 uses arm), grab xposed-v89-sdk24-arm.zip—make sure it's the exact match for your system version.
2. Flash via TWRP
   • Boot into TWRP, double-check that /system is mounted (use the Mount menu!)
   • Tap Install, select the Xposed zip file, and swipe to flash
   • Reboot your device once the flash completes
3. Set Up Xposed Installer
   After reboot, install the official Xposed Installer APK to manage your modules. If you prefer a Magisk-native approach, you can also use the Magisk-compatible Xposed module variant—but the zip method is reliable for Android 7.0.

Quick Reminders #

• Always Verify Mounts First: Most "no partition" errors happen because /system isn't mounted. Double-check this before flashing any zip in TWRP.
• Don't Panic About the "No OS" Warning: This is just TWRP not seeing your system partition. Once you fix the mount issue and confirm your device boots normally, the warning will disappear on future TWRP sessions.

内容的提问来源于stack exchange，提问作者Simon V.