Invalid Ext Status Code: '254' when trying to write bootable image to USB stick

[robwhalliday]

🪲 Description

Was trying to create a bootable usb with High Sierra using Sequoia

sudo mist download installer "10.13.6" bootableinstaller --bootable-installer-volume "/Volumes/install"

This resulted in

┌──────────────────┐
│ INPUT VALIDATION │
└──────────────────┘
├─ User is 'root'...
├─ Download search string will be '10.13.6'...
├─ Include betas in search results will be 'false'...
├─ Only include compatible installers will be 'false'...
├─ Cache downloads will be 'false'...
├─ Output directory will be '/Users/Shared/Mist'...
├─ Temporary directory will be '/private/tmp/com.ninxsoft.mist'...
├─ Force flag has not been set, existing files will not be overwritten...
├─ Bootable macOS Installer will be created on volume '/Volumes/install'...
┌────────┐
│ SEARCH │
└────────┘
├─ Searching for macOS download '10.13.6'...
├─ Found [041-91758] macOS High Sierra 10.13.6 (17G66) [2019-10-19]
┌───────┐
│ SETUP │
└───────┘
├─ Creating new temporary directory '/private/tmp/com.ninxsoft.mist/041-91758'...
┌──────────┐
│ DOWNLOAD │
└──────────┘
├─ [ 01 / 12 ] 041-91758.English.dist....................... [ 08.81 KB / 08.81 KB (100.0%) ]
│ Verifying... ✓✓✓
├─ [ 02 / 12 ] AppleDiagnostics.chunklist................... [ 0328 B / 0328 B (100.0%) ]
│ Verifying... ✓✓✓
├─ [ 03 / 12 ] AppleDiagnostics.dmg......................... [ 02.87 MB / 02.87 MB (100.0%) ]
│ Verifying... ✓✓✓
├─ [ 04 / 12 ] BaseSystem.chunklist......................... [ 01.98 KB / 01.98 KB (100.0%) ]
│ Verifying... ✓✓✓
├─ [ 05 / 12 ] BaseSystem.dmg............................. [ 486.28 MB / 486.28 MB (100.0%) ]
│ Verifying... ✓✓✓
├─ [ 06 / 12 ] InstallAssistantAuto.pkg..................... [ 11.83 MB / 11.83 MB (100.0%) ]
│ Verifying... ✓✓✓
├─ [ 07 / 12 ] InstallESDDmg.chunklist...................... [ 16.53 KB / 16.53 KB (100.0%) ]
│ Verifying... ✓✓✓
├─ [ 08 / 12 ] InstallESDDmg.pkg............................ [ 04.72 GB / 04.72 GB (100.0%) ]
│ Verifying... ✓✓✓
├─ [ 09 / 12 ] InstallInfo.plist............................ [ 01.58 KB / 01.58 KB (100.0%) ]
│ Verifying... ✓✓✓
├─ [ 10 / 12 ] MajorOSInfo.pkg.............................. [ 02.52 MB / 02.52 MB (100.0%) ]
│ Verifying... ✓✓✓
├─ [ 11 / 12 ] OSInstall.mpkg............................. [ 684.04 KB / 684.04 KB (100.0%) ]
│ Verifying... ✓✓✓
├─ [ 12 / 12 ] RecoveryHDMetaDmg.pkg...................... [ 487.84 MB / 487.84 MB (100.0%) ]
│ Verifying... ✓✓✓
┌─────────┐
│ INSTALL │
└─────────┘
├─ Creating image '/private/tmp/com.ninxsoft.mist/041-91758/041-91758.dmg'...
├─ Mounting disk image at mount point '/Volumes/041-91758'...
├─ Creating new installer '/Volumes/041-91758/Applications/Install macOS High Sierra.app'...
├─ Created new installer '/Volumes/041-91758/Applications/Install macOS High Sierra.app'
┌───────────────────────────┐
│ BOOTABLE INSTALLER VOLUME │
└───────────────────────────┘
├─ Copying '/Volumes/041-91758/Applications/Install macOS High Sierra.app' to '/var/folders/zz/zyxvpxvq6csfxvn_n0000000000000/T/Install macOS High Sierra.ad-hoc-code-signatures.app'...
├─ Ad-hoc code signing '/var/folders/zz/zyxvpxvq6csfxvn_n0000000000000/T/Install macOS High Sierra.ad-hoc-code-signatures.app'...
├─ Creating bootable macOS Installer at mount point '/Volumes/install'...
└─ Invalid Exit Status Code: '254', Message: /Volumes/Install macOS High Sierra is not a valid volume mount point.

📋 Steps to Reproduce

1, Run sudo mist download installer "10.13.6" bootableinstaller --bootable-installer-volume "/Volumes/install" with USB stick called Install

✅ Expected Behaviour

Having a bootable USB stick to install High Sierra to Intel iMac

💻 Environment

• mist version (mist --version): 2.1.1 (latest: 2.1.1)
• macOS Version (sw_vers): ProductName: macOS
  ProductVersion: 15.0.1
  BuildVersion: 24A348
• Hardware (system_profiler SPHardwareDataType):
  • Model Identifier: Macmini8,1
  • Chip : 6-Core Intel Core i5

📷 Screenshots

If applicable, add screenshots to help explain the bug.

ℹ️ Additional context

• Is this also a bug in Mist.app? ✅ / ❌
  • Provide links to GitHub Issues
• Links to 3rd-party tools / references / documentation