Xcode 10.1 has a maximum SDK version of 12.1. It does not support iOS version 12.1.2

appium.log

[Appium] Welcome to Appium v1.12.1
[Appium] Default capabilities, which will be added to each request unless overridden by desired capabilities:
[Appium]   xcodeConfigFile: </path/to/file.xcconfig>
[Appium]   udid: <UDID>
[Appium]   wdaLocalPort: <WDA_LOCAL_PORT>
[Appium]   webkitDebugProxyPort: <IWDP_PORT>
[Appium]   wdaLaunchTimeout: <WDA_LAUNCH_TIMEOUT>
[Appium]   platformVersion: 12.1.2
[Appium] Appium REST http interface listener started on 0.0.0.0:4723
[HTTP] --> POST /wd/hub/session
[HTTP] {"desiredCapabilities":{"autoDismissAlerts":true,"automationName":"XCUITest","bundleId":"<bundle_id>","deviceName":"ios","newCommandTimeout":200,"noReset":false,"platformName":"ios","showXCodeLog":true,"startIWDP":true,"connectHardwareKeyboard":true,"xcodeConfigFile":</path/to/file.xcconfig>}}
[debug] [MJSONWP] Calling AppiumDriver.createSession() with args: [{"autoDismissAlerts":true,"automationName":"XCUITest","bundleId":"<bundle_id>","deviceName":"ios","newCommandTimeout":200,"noReset":false,"platformName":"ios","showXCodeLog":true,"startIWDP":true,"connectHardwareKeyboard":true,"xcodeConfigFile":</path/to/file.xcconfig>}]
[debug] [BaseDriver] Event 'newSessionRequested' logged at 1555372039408 (23:47:19 GMT+0000 (Coordinated Universal Time))
[Appium] Appium v1.12.1 creating new XCUITestDriver (v2.110.1) session
[Appium] Capabilities:
[Appium]   xcodeConfigFile: </path/to/file.xcconfig>
[Appium]   udid: <UDID>
[Appium]   wdaLocalPort: <WDA_LOCAL_PORT>
[Appium]   webkitDebugProxyPort: <IWDP_PORT>
[Appium]   wdaLaunchTimeout: <WDA_LAUNCH_TIMEOUT>
[Appium]   platformVersion: 12.1.2
[Appium]   autoDismissAlerts: true
[Appium]   automationName: XCUITest
[Appium]   bundleId: <bundle_id>
[Appium]   deviceName: iPhone 7 Plus
[Appium]   newCommandTimeout: 200
[Appium]   noReset: false
[Appium]   platformName: ios
[Appium]   showXCodeLog: true
[Appium]   startIWDP: true
[Appium]   connectHardwareKeyboard: true
[debug] [BaseDriver] Creating session with MJSONWP desired capabilities: {"xcodeConfigFile":"<>
[BaseDriver] The following capabilities were provided, but are not recognized by appium: showXCodeLog.
[BaseDriver] Session created with session id: 5fd0e7dc-d9c1-4121-acb2-d8331bf60236
[debug] [XCUITest] Current user: 'user'
[debug] [XCUITest] Available devices: <UDID>
[debug] [XCUITest] Creating iDevice object with udid '<UDID>'
[XCUITest] Determining device to run tests on: udid: '<UDID>', real device: true
[XCUITest] Xcode version set to '10.1' (tools v10.1.0.0.1.1539992718)
[XCUITest] iOS SDK Version set to '12.1'
[debug] [BaseDriver] Event 'xcodeDetailsRetrieved' logged at 1555372042054 (23:47:22 GMT+0000 (Coordinated Universal Time))
[XCUITest] Error: Xcode 10.1 has a maximum SDK version of 12.1. It does not support iOS version 12.1.2
[XCUITest]     at Object.wrappedLogger.errorAndThrow (appium-1.12.1/node_modules/appium-support/lib/logging.js:78:13)
[XCUITest]     at XCUITestDriver.errorAndThrow [as start] (appium-1.12.1/node_modules/appium-xcuitest-driver/lib/driver.js:307:13)
[XCUITest] Error: Xcode 10.1 has a maximum SDK version of 12.1. It does not support iOS version 12.1.2
[XCUITest]     at Object.wrappedLogger.errorAndThrow (appium-1.12.1/node_modules/appium-support/lib/logging.js:78:13)
[XCUITest]     at XCUITestDriver.errorAndThrow [as start] (appium-1.12.1/node_modules/appium-xcuitest-driver/lib/driver.js:307:13)
[debug] [XCUITest] Not clearing log files. Use `clearSystemFiles` capability to turn on.
[debug] [BaseDriver] Event 'newSessionStarted' logged at 1555372042058 (23:47:22 GMT+0000 (Coordinated Universal Time))
[debug] [MJSONWP] Encountered internal error running command: Error: Xcode 10.1 has a maximum SDK version of 12.1. It does not support iOS version 12.1.2
[debug] [MJSONWP]     at Object.wrappedLogger.errorAndThrow (appium-1.12.1/node_modules/appium-support/lib/logging.js:78:13)
[debug] [MJSONWP]     at XCUITestDriver.errorAndThrow [as start] (appium-1.12.1/node_modules/appium-xcuitest-driver/lib/driver.js:307:13)
[HTTP] <-- POST /wd/hub/session 500 2658 ms - 221
[HTTP]