A computer that supports target display mode does not switch into or out of target display mode as expected. A computer that supports target display mode switches into or out of target display mode at unexpected times. To reset the SMC on a portable Mac with a removable battery, complete the following steps:Ģ. Disconnect the MagSafe power adapter from the computer, if it's connected.Ĥ. Press and hold the power button for 5 seconds.Ħ. Reconnect the battery and MagSafe power adapter.ħ.
