When I go into "About this Mac" and check for software updates, it tells me that no updates are available. I would need at least High Sierra 10.3.6 in order to install some software. That is why I'm asking this question. I did a lot of research and it appears that this model can be upgraded; but as I said, I get the message that there are no upgrades available!
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Can the OS on a mid 2011 Imac OS 10.12.6 be upgraded
- Thread starter theslaz
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You are right, a mid 2011 iMac can install High Sierra (10.13). Here is the information from Apple on how to install it:
support.apple.com
How to download and install macOS - Apple Support
Download and install current or previous versions of the Mac operating system on compatible Mac computers.
As I mentioned, I did some research and I came across that page about a week ago. I tried to download a copy of High Sierra; However, I got an error message that said the copy was damaged and could not be used.You are right, a mid 2011 iMac can install High Sierra (10.13). Here is the information from Apple on how to install it:
How to download and install macOS - Apple Support
Download and install current or previous versions of the Mac operating system on compatible Mac computers.
My brother has my old 2011 iMac. I have a copy of the High Sierra installer that I gave him and he had the same issue. It looks like it’s a firmware update issue having to do with the new Mac APFS file system.
Read this.
MacOS High Sierra: An error occurred while verifying firmware
I have a Mid 2011 iMac currently running MacOS 10.12 Sierra. It’s not my main machine, but I would like to install 10.13 on it. Updating starts smoothly enough, but when it comes to restarting, I ...
try this
download dosdude1 high sierra patch (google is your friend) > download the iso with it and make your bootable usb stick
the patch will tell you that your mac is natively high sierra supported, this is normal
tare care
download dosdude1 high sierra patch (google is your friend) > download the iso with it and make your bootable usb stick
the patch will tell you that your mac is natively high sierra supported, this is normal
tare care
OP wrote:
"I tried to download a copy of High Sierra; However, I got an error message that said the copy was damaged and could not be used."
Do you still have that copy on your internal drive?
If you do, I think you should try the following to "work around" the problem:
1. Open the date & time pref pane
2. TURN OFF (uncheck the box) the option to "set date and time automatically"
3. Now, SET BACK the clock to January 1, 2019
4. Finally, REboot the iMac.
Then try installing via the installer you currently have.
WHY I'm suggesting you do this:
There was some kind of "certificate expiration" with the older copies of the installer. The installer would fail because of the computer's date/time setting.
"Turning back the clock" works around this oversight.
There are NO OTHER PROBLEMS associated with tweaking the install this way.
Just remember that you need to go back to the date & time pref pane later on to put things back where they ought to be, AFTER the new OS is up and running.
"I tried to download a copy of High Sierra; However, I got an error message that said the copy was damaged and could not be used."
Do you still have that copy on your internal drive?
If you do, I think you should try the following to "work around" the problem:
1. Open the date & time pref pane
2. TURN OFF (uncheck the box) the option to "set date and time automatically"
3. Now, SET BACK the clock to January 1, 2019
4. Finally, REboot the iMac.
Then try installing via the installer you currently have.
WHY I'm suggesting you do this:
There was some kind of "certificate expiration" with the older copies of the installer. The installer would fail because of the computer's date/time setting.
"Turning back the clock" works around this oversight.
There are NO OTHER PROBLEMS associated with tweaking the install this way.
Just remember that you need to go back to the date & time pref pane later on to put things back where they ought to be, AFTER the new OS is up and running.
