Thanks Ed, this did work. The confusion for me comes from the output & results of the "downloadPlatform" command above - the export file is automatically named "iphonesimulator_26.1_23B86.dmg", and there's no mention in the output that the SDK Platform Support (ver 23B77) component has also been exported. There also wasn't anything in the output when running "importPlatform" to indicate that this component was being imported, however it did show up correctly in Xcode afterwards when viewing Settings -> Components. Perhaps some indication in the output from both of these commands that the platform support component is included would avoid this confusion?