Search results: macos sierra upgrade

each mac has its own serial number to distinguish between different machines. when bringing the device to a service center, we also need to provide the exact serial number of the

cleaning up the memory on macos sierra will help the machine run faster, especially able to regain large storage capacity for the system.

during the latest macos sierra version on mac, you will encounter some common errors such as not being able to open the device for use, the download file is corrupted, unable to