OSX 10.10.1 Xcode 6.3 or 6.3.1 xcodebuild version "Xcode 6.3.1"
This happened on one machine and I thought it was a fluke. Has now happened on two machines. I have followed the advice in Why aren't simulators showing in the Xcode 6.3.1 scheme selector?
to no avail. Here is what I see on the command line:
xcodebuild -showsdks
iOS Simulator SDKs:
Simulator - iOS 8.3 -sdk iphonesimulator8.3
in "xcode GUI -> prefs -> Downloads"
iOS 8.2 Sim (checkmark)
iOS 8.1 Sim (checkmark)
iOS 7.1 Sim (checkmark)
in the ios sim application (opened from Xcode -> Open dev tool -> ios sim)
in the "hardware -> device" dropdown menu i see
iOS 7.1 > (lots of choices)
iOS 8.1 > (lots of choices)
iOS 8.2 > (lots of choices)
iOS 8.3 > (lots of choices)
So the Xcode GUI generally agrees with itself, but I need to build for and kick off all of these iOS sims programmatically from the command line, but xcodebuild doesn't see all of the available simulators.
Ignore what xcodebuild -showsdks tells you. You are confusing SDKs with destinations. A simulator is a destination.
The way to know what simulators you've got is with xcrun simctl list.
The way to tell xcodebuild what destination to build for is with the -destination option. You can construct and specify any simulator with which your project's deployment setting is compatible.