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While executing brew update – I get following error code + pop up window from mac os telling me to install “clang”. This process repeat each time.

xcodebuild[2122:12638] [MT] DVTPlugInLoading: Failed to load code for plug-in com.apple.dt.IDESimulatorAvailability (/Applications/Xcode.app/Contents/PlugIns/IDESimulatorAvailability.ideplugin), error = Error Domain=NSCocoaErrorDomain Code=3588 "dlopen(/Applications/Xcode.app/Contents/PlugIns/IDESimulatorAvailability.ideplugin/Contents/MacOS/IDESimulatorAvailability, 0x0109): Symbol not found: (OBJC_CLASS$_SimDiskImage)
Referenced from: '/Applications/Xcode.app/Contents/PlugIns/IDESimulatorAvailability.ideplugin/Contents/MacOS/IDESimulatorAvailability'
Expected in: '/Library/Developer/PrivateFrameworks/CoreSimulator.framework/Versions/A/CoreSimulator'" UserInfo={NSLocalizedFailureReason=The bundle couldn’t be loaded., NSLocalizedRecoverySuggestion=Try reinstalling the bundle., NSFilePath=/Applications/Xcode.app/Contents/PlugIns/IDESimulatorAvailability.ideplugin/Contents/MacOS/IDESimulatorAvailability, NSDebugDescription=dlopen(/Applications/Xcode.app/Contents/PlugIns/IDESimulatorAvailability.ideplugin/Contents/MacOS/IDESimulatorAvailability, 0x0109): Symbol not found: (OBJC_CLASS$_SimDiskImage)
Referenced from: '/Applications/Xcode.app/Contents/PlugIns/IDESimulatorAvailability.ideplugin/Contents/MacOS/IDESimulatorAvailability'
Expected in: '/Library/Developer/PrivateFrameworks/CoreSimulator.framework/Versions/A/CoreSimulator', NSBundlePath=/Applications/Xcode.app/Contents/PlugIns/IDESimulatorAvailability.ideplugin, NSLocalizedDescription=The bundle “IDESimulatorAvailability” couldn’t be loaded.}, dyldError = dlopen(/Applications/Xcode.app/Contents/PlugIns/IDESimulatorAvailability.ideplugin/Contents/MacOS/IDESimulatorAvailability, 0x0000): Symbol not found: (OBJC_CLASS$_SimDiskImage)
Referenced from: '/Applications/Xcode.app/Contents/PlugIns/IDESimulatorAvailability.ideplugin/Contents/MacOS/IDESimulatorAvailability'
Expected in: '/Library/Developer/PrivateFrameworks/CoreSimulator.framework/Versions/A/CoreSimulator'
2022-10-18 10:11:18.484 xcodebuild[2122:12638] [MT] DVTAssertions: ASSERTION FAILURE in /System/Volumes/Data/SWE/Apps/DT/BuildRoots/BuildRoot2/ActiveBuildRoot/Library/Caches/com.apple.xbs/Sources/DVTFrameworks/DVTFrameworks-21304/DVTFoundation/PlugInArchitecture/DataModel/DVTPlugIn.m:374
Details: Failed to load code for plug-in com.apple.dt.IDESimulatorAvailability (/Applications/Xcode.app/Contents/PlugIns/IDESimulatorAvailability.ideplugin)

Solution for following error is executing:

xcodebuild -runFirstLaunch

Recently I got this error message while trying install El Capitan on iMac from mid 2007. I tried changing date (common know certificate problem) – but it did not resolve problem.

I downloaded image from two sources (including official Apple servers) they got exactly same SHA1 and comments of people state it was working.

Because of that I decide use most hardest way – installing MAC-os in unattended way that bypass any check(s).

Boot from created install media & instead starting installation open terminal and execute following command:

installer -pkg /Volumes/Mac\ OS\ X\ Install\ DVD/Packages/OSInstall.mpkg -target /Volumes/iMacHDD

iMacHDD – this is bootable volume name for HDD that You want install Your mac-os (you get it from using disk manager).

/Volumes/Mac\ OS\ X\ Install\ DVD/Packages/OSInstall.mpkg – this is patch to install disk (in my case that was usb-drive)

After executing that command & long wait macOS was installed in unattended way -when it finish just restart computer removing usb media. It will boot straight into new OS and allow first configuration + create new account.

Latest version – allow sending text messages / files to Motorola Mototrbo radios.

Programming Tutorial:

Technical Instruction + Schematics (digitalised by Henri call sign: OH6CMM )

Start update from oldest to newest (if You try latest it will fail as corrupted – most like they change way of signing image and it fail check if trying update latest)