Older OS X Versions MacRumors attracts a broad audience of both consumers and professionals interested in the latest technologies and products. We also boast an active community focused on purchasing decisions and technical aspects of the iPhone, iPod, iPad, and Mac platforms. Restart your Mac when Mac progress bar stuck. Whenever you encounter the boot problem, you can.

The time estimate can be wildly inaccurate. If you decide the installation will never finish, force the Mac to shut down by holding its power button for a long time (at least ten seconds or so). It may restart with the upgrade completely finished. Or, it might not restart at all. In any event you can't wait forever, so it's not as though you have much choice. Give it a few hours, at least.

As long as you created a Time Machine or equivalent backup according to Apple's upgrade instructions, there is no reason to be concerned about losing any of that Mac's data. If forcing the Mac to shut down results in an inability to boot, then boot macOS Recovery and restore the system from that backup.

Mac Os Sierra Download Stuck On Waiting

Mac restart refers to the process where after the installation of new updates is finished, the system shuts itself down and starts again to reflect the changes and improvements in the Mac OS present in your device. A lot of times due to issues during installation of the update or due to bugs, your Mac may get stuck during this point. If the download gets stuck and won’t move past a certain point, however, try restarting it by deleting the partly downloaded macOS Sierra file from the Applications folder. Mac 10.9 update download. You can then restart.