
- HOW TO UPDATE YOUR MAC 10.12.3 INSTALL
- HOW TO UPDATE YOUR MAC 10.12.3 UPGRADE
- HOW TO UPDATE YOUR MAC 10.12.3 PRO
Meanwhile, the displays seem to cycle between receiving a signal and receiving no signal as suggested by the fact that the displays will wake, but then display "No Signal" and go back into power-save mode. The MacBook's screen will turn on and off as it tries to get in sync with the external displays (to start displaying on them as normal).
HOW TO UPDATE YOUR MAC 10.12.3 PRO
Immediately after upgrading from macOS 10.12.3 to 10.12.4 I noticed that when my MacBook Pro (Late 2013) boots up or wakes while plugged into my two external displays via Mini DisplayPort, my MacBook has extreme difficulty getting them both working at the same time. The following paragraph is meant as a high level summary of the issue that is occurring, and I attempt to explain the relevant parts in more detail in the subsequent paragraphs. Please see my answer below for further details. This requires a forced shut down which can lead to loss of data and unsaved work.

Do not close the lid or power off your Mac until installation is complete.Upon updating from macOS 10.12.3 to 10.12.4 the following issues immediately began occurring consistently anytime the MacBook tries to initiate displaying on external monitors that are in power-save mode (i.e.

HOW TO UPDATE YOUR MAC 10.12.3 INSTALL
Do not close the lid or power off your Mac until installation is complete.Īfter you've gone through the preparation steps, you need to download and install the latest version of macOS.

HOW TO UPDATE YOUR MAC 10.12.3 UPGRADE
If your Mac is running OS X Lion or Mountain Lion, follow these steps to upgrade to El Capitan. If your Mac is running Mavericks or newer, you can proceed to upgrade to Catalina. * If your Mac is running OS X Lion or Mountain Lion, you must upgrade to El Capitan before you can upgrade to Catalina. The following versions of OS X and macOS can be upgraded to macOS Catalina. If anything goes wrong, you can restore your Mac to its previous state. Back up your dataĪlthough not required, we strongly recommend you back up your Mac before proceeding with an upgrade. However, you can still try to upgrade to El Capitan. If your Mac is not on this list, you cannot upgrade to Catalina.
