![]() ![]() Which, in this case, should also work for iMac's bought in 2016.First you need to confirm that your Mac will be able to run the version of macOS or Mac OS X you want to install.Īs a guide, expect your Mac to be able to run any version of macOS or Mac OS X that was supported when that Mac launched, and any that were released in the few years immediately following your purchase. ![]() Interestingly this is against the requirements of the Mac OS itself, because if you look up the system requirements for OS X Mavericks, it only says "iMac (Mid-2007 or later". And indeed, the technical supporter confirmed to me (after checking herself for a couple of minutes) that an iMac must run at least the version which was factory-installed. ![]() Because the newly bought iMac has some time limited Apple support, I decided to call Apple and get a verification on that. Therefore the forbidden sign I saw on the Mavericks setup must be that mentioned "prohibitory symbol" then. The image on your display appears to shrink, has black bars around it, or appears tinted. The fans in your Mac operate at a faster or louder speed. You don't hear any sound from your Mac. Your Mac doesn't respond to your trackpad, mouse, or keyboard. You see a message that you're using an unsupported or incorrect version of the Mac operating system. Your Mac doesn't start up, or you see a prohibitory symbol at startup. If you copy older system files from another computer to your Mac, or try to use startup disks designed for older computers, you might experience one or more of the following symptoms: If you try to use an incompatible version or build, your Mac might behave unexpectedly. Your Mac is designed to work only with compatible macOS versions and builds. Use the Mac operating system that came with your Mac, or a compatible newer version This page says as of today (November 20 2016): I let it keep like this for around 10 minutes, but nothing happened.įinally I discovered the following page on Apple's website. This time the Apple icon appeared - but nothing more. This took quite a while but when it was finally finished, I tried to boot from this new USB drive. Because the new iMac doesn't have a DVD-Drive anymore, I first needed to create a dmg image from the CD and from the dmg created an iso (using dmg2iso on Linux) to then create a bootable USB drive with the 10.6 image. I tried the same with the original Mac OS 10.6 CD's which were still lying around in the office. But then, just an icon "forbidden" appeared. I created a USB drive with the Mavericks setup on it and was able to select the USB drive after booting with the Alt-key pressed. So we decided to go back to the latest known working version (Mavericks). According to Canon, the latest available driver for this ipf 710 printer was Mac OS 10.9 Mavericks. Once the new iMac was configured (with Mac OS 10.11 El Capitan) we've hit two problems already:ġ) The software for creating and drawing construction plans (essential for the office) is not officially compatible with El CapitanĢ) The plotter printer (Canon ipf 710) has no drivers for El Capitan. I'm not at all experienced in opening and replacing iMac parts, so I suggested to buy a new iMac. Holy sh*t! That's not just a simple replacement as you'd do in a tower computer that's pulling apart the whole computer. He asked me for his help and I looked up some tutorials and videos how to replace a graphics card in this iMac 2009. Most likely the graphics card got defect. Last week an iMac 27 inch bought in 2009 broke down. I've never seen him driving around with a Mac bumper-sticker. Although he's been using the Macintosh for almost three decades, he never became an Apple-hipster. Even when Apple almost disappeared he staid loyal to Apple. My fathers's office runs Apple computers since the 80's. That's exactly what happened last week with a new iMac 27 inch. You want to move in but you realize that all your chairs, tables, beds and even your multimedia stuff is not compatible with the new house. Published on November 21st 2016 - Listed in Personal Hardware Mac Apple Downgrade Mac OS X on a new iMac? Forget about it! ![]()
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