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All replies
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Helpful answers
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Oct 9, 2015 1:22 PM in response to ivividby JimmyCMPIT,did you do a clean install or an update of the OS?
are you using the Mac Mail client or something else?
do you have a backup?
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Oct 9, 2015 2:58 PM in response to JimmyCMPITby ivivid,I did the El Capitan update. Yes, I since tried to use my full time machine backup which it will not restore from despite finding it (my intention was to restore to my Yosemite backup done prior to doing the update). I cannot re install El Capitan as it says the start up disc is locked (it now shows as a "Recovery HD" and is showing as locked. So I cannot reinstall, I cannot recover from my backup, and I cannot erase and reinstall via Disk Utility as that option is greyed out. So I have a very expensive desk ornament? Help!?
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Oct 9, 2015 4:43 PM in response to ivividby EVISCERATOR,Help is available here. What year and model is your iMac, fusion drive? Protect your back up.
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Oct 9, 2015 8:49 PM in response to EVISCERATORby ivivid,I just bought it two months ago. Fusion drive yes. 4G quad processor. Can't look up anything else much as it won't boot apart from to let me on safari. 8G ram only...
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Oct 9, 2015 9:13 PM in response to ivividby EVISCERATOR,Hi ivivid: If your computer is new, I suggest you make an appointment at the apple store and let them fix it for you, this would be best choice.
Working with fusion drives requires extra knowledge. If for example you wanted a clean install (erase install) on a fusion drive, the procedure is very different than on a rotational HDD. If, for example, you formatted or deleted the macintosh HD in disk utilities you also separated the SDD from the HDD and it is a difficult procedure to repair it. It can be done as I do it myself from time to time.
First of all if you just did a normal update you should not be having this problem, unless there is something else wrong.
Can you boot into recovery (command r at start up)? or internet recovery (option command r at start up) where you see a spinning globe?
Let me know so that I can give you more help or let me know if you decide to take it to the apple store ok?
Tom
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Oct 10, 2015 1:22 PM in response to EVISCERATORby ivivid,Thank you... I do appreciate your thoughts. So far I have got there in the end. I used my old mac, made a bootable Yosemite installer and hooked it up starting up from the installer by holding option down. Still had difficulty, as when I went into Disk Utility to erase El Capitan, erase wasn't an option, I had to repair the drive, then I could do it (told me it was damaged). Installed Yosemite, hooked up my Time Machine, had a moment of panic as it only showed me one backup and the date was wrong, however I had no choice. Selected that, let it run overnight, it got to the end of the progress bar and never finalised. In the end I restarted with the power button, fired up, and everything is back including the last lot of work I did and the most recent emails received. Will be VERY wary of this installer now; no idea how to do this without losing my stuff (and yet people have). I had put in my apple ID, but it was like none of my information existed anymore. Very frightening when this new machine is my power workhorse. Thank goodness for time machine, multiple external drives and being a pedant about backing up! It does also make me wonder whether it is also an idea to run a different type of backup to another drive also - in addition to just through time machine. I appreciate your help, and hope this may help others. Viv, NZ
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Oct 10, 2015 1:43 PM in response to ivividby EVISCERATOR,Glad you got it sorted; when you are feeling brave and you have several hours of free time, reply to this post and I can give you instructions for doing a clean install of El Capitan on a fusion drive. El Capitan is very fast with a clean install.
Tom
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Oct 10, 2015 3:33 PM in response to EVISCERATORby ivivid,Interesting; yes that would be great... I didn't realise I would have to do something in a different way, would appreciate your assistance! Still Sunday here... lost all of yesterday sorting my machine, I always like to be able to upgrade. First one ever than has gone wrong since I had a Apple IIe+ back in some year that sounds like 1983... Lol
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Oct 10, 2015 4:46 PM in response to ivividby EVISCERATOR,OK brave one, here it is: Please PRINT A COPY OF THIS in case you get stuck.
First, download El Capitan but don't install it, instead make a usb bootable installer.https://www.404techsupport.com/2015/07/macosx-elcapitanusb/
Note: You must follow the instructions while Yosemite is installed or from internet recovery (Lion thru Yosemite) as the new version of disk utility (version 15) will not "fix" your fusion drive.
Note: make a backup I use time machine.
Note: While in terminal, you hi light what you want to copy (UUID string at the top) in the regular manner but must use command c to copy and command v to paste.
Note: After you have "Fix" the drive, plug in your El Capitan installer, quit disk utilities and it will ask what disk you want to start up from, select El Capitan installer. When the installer boots up, install like normal.
When El Capitan starts, do not login into iCloud (skip) and set up an account different from the one you use now.
Next, use migration assistant (found in your utilities folder) to transfer all of your data and settings from your backup.
You must use migration assistant.
The steps I took:
- I booted from recovery mode (Hold 'Command' and 'R' while starting up)
- From the menu screen ... On the top bar I selected 'Utilities > Terminal'.
- This opened a terminal window.
- Then I typed: diskutil CoreStorage list
- And hit 'Return' ...
- This showed the main storage drive details.
- From there I found the UUID string ...
- Which is basically the long number displayed under the storage drive name.
- I selected and copied this ...
- Then I typed: diskutil CoreStorage delete
- Followed by the UUID string number ... And hit 'Return'.
- The system then erased the main drive (it left the recovery dive intact though).
- I then quit Terminal ... And went back into 'Disc Utilities'.
- Only to find all of the drives displayed individually and in red ...
- The 'Solid State Drive' and the 'Hard Disc Drive' were no longer displayed as one 'Fusion' unit.
- However ... Upon clicking on one of the drives ...
- The system recognised they were not unified ... And prompted me to fix this.
- I asked the Disk Utilities to 'Fix' ... And the system returned to its normal state.
- With the drives displayed as:
• Internal Drive • Macintosh HD
- I was then able to install the OS X on the 'Macintosh HD' partition.
This also works with internet recovery (hold option command r at startup) as long as your original OS was Lion thru Yosemite. Also works when booted from a usb installer (only Lion thru Yosemite). Does not work with anything in El Capitan.
Best of Luck: Tom
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Oct 16, 2015 7:05 PM in response to EVISCERATORby Russell Vaught,Does anything work with El Capitan?
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Oct 16, 2015 11:31 PM in response to Russell Vaughtby EVISCERATOR,It's real fast for surfing the web!