Help-timeout[0],(240s),kextd wait(0)

I will install Sierra.I can get into the white apple screen,but it paused before went to the installation screen and display:
「AppleALC: patcher @ lookup patching applied only 0u patches out of 2u
busy timeout[0],(240s),kextd wait(0):'x86paltformplugin','IONDRVFramebuffer','IOHDACodecFunction','IOHDACodecFunction','IOResources'
busy timeout[1],(240s),kextd wait(0):'x86paltformplugin','IONDRVFramebuffer','IOHDACodecFunction','IOHDACodecFunction','IOResources'」
How to solve it?