58
votes
Accepted
How can I attempt to boot an older version of macOS than my hardware supports?
First things first—we need to get verbose boot working, so we can see what the computer is doing. I don't know why cmdV doesn't work, but there's another way.
Open the bootable USB installer in Finder ...
- 7,383
12
votes
Accepted
Downgrading MacBook Pro 16” to Mojave
No. This won’t work since the drivers to run this hardware only ship with Catalina.
If your support team isn’t ready for Catalina have them get you VMware fusion so you can run the older OS ...
- 236k
11
votes
Accepted
How to install OS X 10.9 on a new Mac mini loaded with OS X 10.11
You probably can not do this. The older versions of the Apple OS X operating systems are not capable of running on hardware yet to be designed. For this to work, Apple would have to have released an ...
- 40.4k
8
votes
Downgraded from Big Sur to Mojave on Macbook Air, Photos app won't open
It's not truly surprising. Apple frequently makes format/database changes with upgrades. The resulting files are almost never convertible 'downhill', there is simply no provision to be able to do that....
- 116k
7
votes
Accepted
Downgrading from macOS Catalina to macOS High Sierra
Did you try the following Recovery key combination as in your case Shift-Option-command-R may help
Command - R: Install the latest macOS that was installed on your Mac.
Option - Command - R: Upgrade ...
- 6,707
5
votes
Save me from Sierra
The rule of thumb is - no Mac can boot to any OS that is older than itself.
This rule has some slight variance at the cusp of new OS/new Mac model, but can normally be relied on.
That would mean that ...
- 116k
5
votes
Accepted
Downgrading (user homes) to macOS Sierra
It will be very difficult to isolate the issue to individual preference files, since there could be several subtle issues.
Better to take the opposite approach - start with no preferences and only ...
- 639
4
votes
How to downgrade iOS 11 beta to iOS 10 without PC?
It's impossible without a PC or a Mac to initiate the wipe and also host the reinstall image download and USB control during the downgrade.
In addition to the "computer" - you need an Apple tool ...
grg♦
- 201k
4
votes
How to downgrade SMC firmware
Download the 1.69f3 SMC 1.5 Update from (MacBook Pro SMC Firmware Update 1.5). This gives you the file "MacBookProSMCUpdate.dmg", mount that and look for the file "MBP15.pkg" and ...
4
votes
How to downgrade from El Capitan to Snow Leopard?
As Monomeeth pointed out, a firmware update which requires 10.6.3 might have prevented me from installing from the CD and bootable USB.
I was able to get an image of 10.6.8 and restore it to my hard ...
- 53
4
votes
How to install OS X 10.9 on a new Mac mini loaded with OS X 10.11
Assuming that you're talking about the latest Mac mini (Late 2014) at the time of writing, you won't be able to install 10.9 on it. It shipped originally with 10.10, so that'll be the earliest that ...
- 51
4
votes
Downgrading from macOS Catalina to macOS High Sierra
You need to first make sure that your model of Mac supports running macOS High Sierra. If your Mac came pre-installed with macOS High Sierra of any earlier version, it can run macOS High Sierra.
...
- 51.9k
3
votes
Reliable way to downgrade iPad 2 to iOS 6 without SHSH
Apple is currently signing iOS 6.1.3 for the iPad 2 and iPhone 4S. Simply download the appropriate IPSW and Shift+Restore (Option+Restore on MacOS) in iTunes. The signing status of iOS 6.1.3 for these ...
- 4,532
3
votes
Downgrading from Safari 12 (beta) to Safari 11
This applies to Safari 12 final as well.
Overview of options
Restore your machine from backup.
Depending on methods this might take a while. You also have to make sure to turn off Auto-Update in ...
- 8,279
3
votes
Can I erase and reinstall MacOS and not lose my windows partition and my Dual boot option
If Mojava is installed to a APfS volume, proceed as follows:
Boot to the USB High Sierra installer
Open the Disk Utility
Remove the APFS volume containing Mojava
Add a new APFS volume
Quit the Disk ...
- 40.4k
3
votes
Need to get legacy version of an iOS app
As mentioned in the Compatibility section on the app webpage, the app in question requires iOS 8.0 or later to run. You can only download the legacy version of an iOS app if the app developer ...
- 51.9k
3
votes
Accepted
Is the macOS recovery also upgraded when i run mac upgrades?
When you restore a Mac from Internet Recovery it restores the OS version that came with the Mac when it shipped. So if your Mac came with Mavericks than it will reinstall Mavericks. From there you can ...
- 22.9k
3
votes
Can't get in macOS Utilities
Since Mojave isn't officially supported the recovery partition might be missing.
An alternate way to access the utilities without the CMD+R is to create an install usb. To do this first pick which ...
- 198
3
votes
Broken battery - downgraded performance
On the older MacBook Pro models, it's not a software function that reduces power. It's actually a hardware requirement, managed by the SMC to utilize both mains and battery to get full performance. ...
- 102k
3
votes
Downgrading 2020 13" MacBook Pro to run macOS Mojave
There is a startup check that prevents users from booting any version of macOS older than what was current at the time the machine was first released. As it so happens, just yesterday I wrote up a ...
- 7,383
3
votes
Can you downgrade a 2021 iMac to Mojave?
You can‘t run old macOS versions on newer hardware, there usually are some drivers missing. There are special constellations in some cases (and we probably have some answers beneath similar questions) ...
- 101k
2
votes
Best OS X for late 2009 MacBook
Since it's been a while since this question has been answered, and this machine still seems to be in use (at least by the question author and myself) as of last year, I'll toss in a three-part answer ...
- 25
2
votes
Best OS X for late 2009 MacBook
I don't know if this is still relevant given the date of the original posting. I am presently using a late 2009 MacBook with 8GB of RAM, a 250GB SSD (from OWL) and High-Sierra. The machine is very ...
- 21
2
votes
Accepted
How to downgrade iOS from 9.3.1 to 7.1 (default version)?
You can't install older versions of iOS (see Can I install any iOS version I wish by picking and choosing which firmware to restore? for details), but you can run the simulator in Xcode with older ...
- 101k
2
votes
Accepted
Downgrade GCC version
To install GCC 4.7 from Homebrew:
$ brew tap homebrew/homebrew-versions
$ brew install gcc47
which will install it as gcc-47. If you want to install as gcc instead:
$ ln -s /usr/local/bin/gcc-47 /...
- 138
2
votes
Can you install OS X from a USB on late 2010 iMac?
Your iMac late 2010 is compatible with Sierra according to the official MacOS Sierra - Technical Specifications page.
Mac Hardware Requirements
For details about your Mac model, click the ...
- 521
2
votes
How to downgrade from El Capitan to Snow Leopard?
Solving a problem to install Final cut studio in Snow Leopard. I also had a BIG problem and hopefully this will help.
Partition your drive in El Capitan, find out how on YouTube.
Try to buy or find a ...
- 21
2
votes
Accepted
How to downgrade from El Capitan to Snow Leopard?
I am adding this as an 'answer' to provide more context as to what solved the OP's issue (and to save others from reading through the comments history). Hopefully this will help someone else in a ...
- 64.6k
2
votes
Accepted
Can I use El Capitan on a MacBook that is shipped with Sierra?
Nope, the 2016 15-inch MacBook Pro can not run El Capitan. The oldest it can run is 10.12.1 (16B2659).
If you attempt to boot El Capitan, it will present you with the prohibitory symbol.
- 3,317
2
votes
Without a backup, can I downgrade from Sierra to El Capitan?
If you downloaded El Capitan Installer in Mac App Store before, you can find the application in your Purchased section on the top of the app, where you can download it again, write the installer to a ...
- 143
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