That fails:
Finding content...
Automatically resolved architecture variant for platform iOS as 'arm64'.
Downloading iOS 26.0 Simulator (23A5287g) (arm64): Preparing to download...2025-07-21 18:01:24.029 xcodebuild[72642:29551464] DVTDownloadable: Download Failed. Downloadable: {
architectures = (
arm64
);
authentication = none;
category = simulator;
contentType = cryptexDiskImage;
dictionaryVersion = 2;
downloadMethod = mobileAsset;
fileSize = 8455792929;
identifier = "com.apple.dmg.iPhoneSimulatorSDK26_0_b3_arm64";
isInternalContent = 0;
isUserInitiated = 1;
name = "iOS 26.0 Simulator (23A5287g)";
patchableFrom = (
);
platform = "com.apple.platform.iphoneos";
simulatorVersion = {
buildUpdate = 23A5287g;
version = "26.0";
};
version = "26.0.0.3";
}. Download failed as the server said it was a bad request. (Asset download for com.apple.MobileAsset.iOSSimulatorRuntime ae765f33068e7c552052dbff7b253622062c002e)
Downloading iOS 26.0 Simulator (23A5287g) (arm64): Error: Error Domain=DVTDownloadsUtilitiesErrorDomain Code=-1 "Download failed as the server said it was a bad request. (Asset download for com.apple.MobileAsset.iOSSimulatorRuntime ae765f33068e7c552052dbff7b253622062c002e)" UserInfo={NSUnderlyingError=0x6000017ac3c0 {Error Domain=com.apple.MobileAssetError.Download Code=40 "Download failed as the server said it was a bad request. (Asset download for com.apple.MobileAsset.iOSSimulatorRuntime ae765f33068e7c552052dbff7b253622062c002e)" UserInfo={NSLocalizedDescription=Download failed as the server said it was a bad request. (Asset download for com.apple.MobileAsset.iOSSimulatorRuntime ae765f33068e7c552052dbff7b253622062c002e), checkConfiguration=true}}, NSLocalizedDescription=Download failed as the server said it was a bad request. (Asset download for com.apple.MobileAsset.iOSSimulatorRuntime ae765f33068e7c552052dbff7b253622062c002e), DetailedAssetAttributes=Failed downloading asset with attributes ({
Architectures = (
arm64
);
ArchiveDecryptionKey = "M0AuBybTqdCMDDDsLPgynigbi8UwKe6w6SBvMx9HzTk=";
ArchiveID = "0WMWPV5J4BZGt+EhjKj86F+qNuAhvzpvfZxukbrECHM=";
AssetFormat = AppleArchive;
AssetType = "com.apple.MobileAsset.iOSSimulatorRuntime";
Build = 23A5287g;
Ramp = 0;
SimulatorVersion = "26.0";
"_CompressionAlgorithm" = AppleArchive;
"_DownloadSize" = 8455716864;
"_Measurement" = {length = 20, bytes = 0x65578831ce89fd4e7f141eada1abda706131d965};
"_Measurement-SHA256" = {length = 32, bytes = 0xd7bbad07 a2973660 d725c11c 5edfbdb2 ... fc07bbd6 84ae3380 };
"_MeasurementAlgorithm" = "SHA-1";
"_UnarchivedSize" = 8476626944;
"__AssetDefaultGarbageCollectionBehavior" = NeverCollected;
"__BaseURL" = "https://updates.cdn-apple.com/2025/mobileassets/043-58065/41777ED2-0F8E-4A66-914B-ACB3CE9852F1/";
"__CanUseLocalCacheServer" = 1;
"__RelativePath" = "com_apple_MobileAsset_iOSSimulatorRuntime/4B2F9372-9C2B-43B6-969B-F732A46163BD.aar";
})}
Topic:
Developer Tools & Services
SubTopic:
Xcode