Here’s how: From the menu bar on your Mac, select the Apple icon on the top left. Select “Software Update”. Select “Advanced”. Make sure all boxes are checked. Note: for a Mac to automatically update, it must be connected to power. Keep in mind you have a bit of control here, too.
- Wait as your Mac searches Apple's servers for any macOS software updates currently available for your system. If no updates are available, you'll be returned to the command prompt.
- If you can't get your Mac to update correctly, the first thing to do is run the Safe Mode update. Safe Mode is a diagnostic mode that you find in both Windows and Mac operating systems. It prevents some of the usual background processes from running.
While macOS upgrades should always proceed in a sequential fashion, sometimes things go awry. Typically, the Software Update preference pane shows all updates available for your current release of macOS, and when installed, they disappear from the list.
However, I recently had a crash during an update that left me confused as to whether a security fix was installed or (based on errors) the whole thing had gone pear-shaped. Software Update showed no outstanding items to install, but I wanted to be sure.
Fortunately, there’s a way to review your system upgrade history, though you may have never needed to dig it up before:
Hold down Option while choosing the menu and select System Information.
Click the Installations link under Software in the left-hand list.
Scroll down under Software Name to find macOS, and you can look through a list of all updates ever installed on the system.
I’ve been migrating my current Mac setup for so long that even though the computer is just four years old, the list of updates goes back to OS X 10.8.
If you want to find just the most recent updates, click the Install Date column and click it again, and it will order items from most recent to least recent. Scroll to the top and you can look through what’s been changed.
Ask Mac 911
We’ve compiled a list of the questions we get asked most frequently along with answers and links to columns: read our super FAQ to see if your question is covered. If not, we’re always looking for new problems to solve! Email yours to [email protected] including screen captures as appropriate, and whether you want your full name used. Not every question will be answered, we don’t reply to email, and we cannot provide direct troubleshooting advice.
The below is taken from https://www.maketecheasier.com/fix-frozen-mac-when-updating-macos.
1. Install the Update in Safe Mode
If it’s clear that your Mac update isn’t going anywhere, then hold down the power button to turn off your Mac. Once you’ve done this, boot your Mac into Safe Mode. There are several ways to do this, but the simplest is by holding the Shift key as it’s booting.
The Apple logo should appear on your screen with a loading bar, and after that you should boot into Safe Mode. From here, run the macOS update as you normally would to install the update – hopefully without a hitch.
2. Check the Apple Systems Status Page
A very quick and easy thing to do that could save you a lot of hassle with stuck updates (or other malfunctioning Apple services) is to go to the official Systems Status page. Here you’ll see the status of just about every Apple service you can think of. Look over at the status of “macOS Software Update” to see whether the update servers are working as they should. If the bubble is green, then they’re fine and the issue lies elsewhere. If it’s red or yellow, then you’re just going to have to sit out the problem until servers are back to normal.
Speaking of sitting it out…
3. Sit it Out
As painful as it sounds, you may just want to let the Mac sit for a couple of hours and see if it is indeed frozen. Sometimes, the update could be stuck in a lull but not completely frozen. Some update processes will take much longer than others, resulting in a seemingly stuck progress bar.
We can verify that the system is still updating by pressing Command + L to bring up the estimated install time. If this doesn’t appear, still let the update sit for a while.
Some users have reported their update taking upwards of ten hours. Grab a coffee, do some other work, run some errands, do whatever you need to do to burn some time and let your Mac do its thing. Big system updates (sometimes) take a whole lot of time!
4. Refresh the Update
If you are positive that the install is indeed frozen, you will want to take the following steps, and the following steps consecutively after this step, until the issue is resolved.
Mac System Update Not Showing
Let’s try to give the install a little kick by refreshing it.
Mac System Update Stuck
- Hold down the power button and wait for about 30 seconds.
- When the Mac is completely off, press and hold the power button again. Now, the update should resume.
- Press Command + L again to see if macOS is still installing.
Mac System Update Not Working
If there is no avail, continue onto the next solution below.
5. Reset Your NVRAM
Mac System Update Os X 10.7
NVRAM, as Apple describes it, is “a small amount of your computer’s memory that stores certain settings in a location that macOS can access quickly.” It also happens to hold kernel panic information, which is what we’re tapping into and especially trying to reset here.
System Update Mac Os
- Press and hold the power button on your Mac to completely shut it off. Hard discs and fans need to stop spinning, and the screen needs to go dark.
- Power on your Mac.
- Immediately after you hear the startup sound, press and hold the Command + Option + P + R keys.
- Keep holding them down until you hear the start up sound again.
- Release the keys, and the NVRAM will have reset. The update should resume.