Boy do I feel your pain, my 2013 27” iMac has many of those issues, along with wonky bluetooth, and the ports are dying on mine. Resetting the SMC on mine last week helped a bit. My iMac is still on Sierra for software reasons, but at least it’s acting slightly better now than it did for several months.It's funny to see all this speculation. But then what happens when we come back to earth and reality? The fact is, we don't know anything at all about what the new iMac will be like (and I'm generously assuming that a new iMac will be announced on 06/22 in the first place!).
I still cannot get over how pitiful the new iPad Pros were - this after waiting for them for so long, and speculation going absolutely wild. What we got was something so puny, it was hard to believe - virtually nothing wrt. the processor, some lame LiDar camera that's only relevant to apps which have almost no practical uses in real life out there... and that's pretty much it! Unbelievable after all this speculation, and more importantly after such a long wait!
This is what I keep thinking when I look at all the speculation about the new iMacs - what if it's just a "barely-there" bump in a few specs? Apple is fully capable of doing that - just look at the new iPad Pros!
My situation is that I have a late 2009 27" top of the line iMac that I purchased in the beginning of 2010. So it's at this point an almost 11 year technology. It no longer takes new MacOS updates - I'm on the highest it will take, which is High Sierra 10.13.6
It still works, more or less. But it's slowly on the way out - I try not to shut it down, because it takes increasingly heroic measures to start it up again. It seems to overheat pretty much all the time, with fans going strong - so I shut it down last night. This morning, I couldn't get it started up until I disconnected all external stuff like hard drives, keyboard and so on, and also - this is the final measure - until I actually unplugged it from the outlet. I plugged it back in, and this time it finally started up. Whew! Close call. I live in fear that one day it simply won't start up, so I try to not to shut down.
The other thing is that it has a spinning hard drive, and I'm pretty sick of those.
So I'm definitely in the market for a new iMac - but nothing has inspired me so far. Other than the SDD, I see almost no reason to update based on the technology or design. I get that the screen is better, but my screen is OK for my purposes. And really what else?
What I'd love is for the new iMac to get a re-design, thinner bezels, less of a chin - so the various mocksups out there look enticing. I'm also one of those folks Apple fans love to hate - in that I actually LIKE when the computer is thinner and lighter... sorry! I don't get those complaints about "obsessed with thinness". Look, given how the iMac is used - i.e. you need to manually move it around, OF COURSE it being thinner and lighter is a boon. My iMac is HEAVY - and I like to move it around, because I use it as a TV screen when I watch movies and I need to turn it around, so light is very important to me.
That said, I'd like for the new iMac to run cooler. The overheating and the fan noise are a total turn off. I realize that making it thinner makes thermal solutions harder, but hey, that's the whole point of innovative technology, we want to eat our cake and have it too.
I'd like for the SSD to be standard across the lineup, and not just an expensive option - I'd love for the 1TB SDD to be a reasonable price, because that's what I think is a kind of minimum. Connectivity is important to me - I have 12 external HDDs connected to my iMac right now and will connect them to the new iMac.
I'd like for the 16GB RAM to be standard across the line (and not to cost an arm and a leg).
Better camera would be nice - it's embarrasing that my iPad Air 3 has a better camera than my iMac, but OK, my iPad is from 2019 and the iMac is a 2009 model, so I'm hoping that there's been progress since then.
Mostly, I'm worried that we'll be given some very lame update that makes me want to hang on to my ancient computer just because I'd feel like a fool shelling out $3K for old technology that's barely an improvement over what I have right now. We'll see - 06/22 is only a week away!
Maybe give SMC reset a try?
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