My beautiful iMac i7 3.4 - which I specifically bought before Apple brought out the new abominations without the separate IDE and flash, but with fusion drives instead, and with no DVD drive - came with Lion installed. Now Mavericks has cleaned out Lion completely, and the meagre €2,500 I spent on this computer (including €170 I paid Crucial for RAM), wasn't enough for Apple apparently to send the machine to me with a ******* DVD of the OS in it.

Now it\s not that I really mind buying ML for €15, but I don't know what it will take to force feed it to this Mavericks tainted machine. I read that a requirement for ML is that the computer already has Lion on it. Apple and the Mavericks upgrade have left me with few options!... As if it would be too much trouble for THEM to leave some flexibility in all this, and let US decide whether and when to upgrade, after we have gotten the Mavericks sour taste, it hasn't occurred to them we might want to revert...  - and of course miss out on important features like Maps, Notifications, iMessages etc.......

By the way, did Budleigh survive the torrential deluges of late?

You run your song,

You can send me screen copy of the Activity monitor (cpu memory and disk) at : cb dot pub at numericable dot com so I look at them

You can make your own DVD.

http://www.macworld.com/article/1167857/how_to_make_a_bootable_mountain_lion_install_drive.html

http://www.macworld.com/article/2056561/how-to-make-a-bootable-mavericks-install-drive.html

What I will do

Split your disk into a second partition

Instal ML and Logic on it

And do some tests

Thanks Cyril, I may take you up on that, once Apple replaces the faulty graphics card, for only mentalists can work on my system now...

@Errikos said:

By the way, did Budleigh survive the torrential deluges of late?

Not really. Part of the cliff collapsed on the Jurasic coastline at Budleigh. And Thurlestone had the same issues. I was in Thurlestone all day today and the coastal erosion is all too apparent.

The new iMacs should have all been recalled, but that would affect Apples share price, so they just deny there's a problem. 

That said, looking forward to getting an iMac one day once I'm confident like a lot of other people. A lot of people I see around the music forums are saying more or less the same thing.

Good new my Macpro is back and running smothely with Maverick.

My Macpro had two problems taking ages to boot and playing a lot of pops crackels ;

- I had a faulty cable on one of my Sata III raid 0 of ssd and those d... sata plug does not stay in place

- The Wifi was on.

Playing my test song in 5.1 with buffer in Logic set to 512, the CPU is idle between 60 to 85 %, my big template is set with preload buffer at the minimum

I still have a little problem, there is 3 or 4 pops on that 26 minute piece.

I have noticed in Logic only core 1 and 12 are playing

If I reduce the buffer to 64 in Logic, the Idle is still  between 60 to 85 %, but I only get crackles

I have seen that there is a new parameter in MIR : the impulse buffer that is a 3 GB, should I increase it ?

Why do I still have those pops if I still have 60 % idle

Is there is a utility that show acurely the load on each core ?

Best

Cyril

@Cyril: Good to see that everything is working for you Cyril. I just had my local Apple reseller change my faulty graphics card, now I am emptying my hard drive, reformatting it, and will try and run ML for a while.

@Paul: Sorry to hear that Paul, but glad you're alright.

@Errikos said:

@Cyril: Good to see that everything is working for you Cyril. I just had my local Apple reseller change my faulty graphics card, now I am emptying my hard drive, reformatting it, and will try and run ML for a while.

You do not need to reformat, you create a partition to install ML 

I just got my iMac back with ML installed, I will keep anyone interested here posted on how it compares with Lion and Mavericks.

When I bought my big iMac (27 inch 3.4ghz) it developed a rather obnoxious blue line down the centre of the screen. I took a pic with my phone and then took it into the shop where I bought it .. they replaced the whole screen. Apparently this had been a known problem with the iMacs but apple will replace it without any arguement.

Ever since then that computer has been great. It's a mid 2011 model .. and I own three of them. One was a swap for my 17inch MacBook Pro which i toasted, and the other was ex-demo from my local drug store so I got another 27 inch iMac about $500 cheaper than it should have been :D

Anyways, as I say, apple are usually pretty good about replacing bum parts. As for Mavericks .. I like it, I can't say I see any huge performance boost over previous OS's but that may be because I've used it for a while so I've gotten used to it. I do appreciate it's networking and in order to maintain a good connection between my Mac's I upgraded all my machines to Mavericks. Also it gave my the excuse to dump Logic 9, and Pro-Tools 10.

High end iMacs are actually surprisingly powerful computers .. I can't say they'd be as powerful as a previous gen. Mac Pro but I'd bet they'd give 'em a run for their money. I'm still waiting for delivery of my brand new shiny Mac Pro (3.5ghz 6-core). But here's a nice thing I found out .. using the thunderbolt connection you can use the 27inch iMac as a display for the Mac Pro, and it works as fast and well as plugging it into a standalone 27inch cinema display .. so that's pretty cool. So I already have 2 x 27 inch screens for my Mac Pro to use. That's very nice as it saves me spending another $1,000 on screens for it.

Jusr wish it would hurry up and get here!!! ::taps foot::

When I installed Mavericks my computer's speed went down on a parabolic slump in terms of speed, and I am not talking professional applications, I am talking opening Safari, lag in responding when clicking on an Apple menu item, changing from account to account, etc., without me having done anything else. I read in several fora that this could be the case because of a program that might conflict with the OS and other CRAP. I have been working with Macs since 1988 and this is the very first OS - and without shifting the paradigm, i.e. not going from 9.2 to X - is so "sensitive" to the user's hard drive's contents.

1) Apple should have stipulated that users empty and re-format their computer before installing due to the real danger that Mavericks could turn it into jelly.

2) They should rescind their cretinous and so greedy recent practice of not including the OS CD in the packaging of a $2,500 computer, since in the event of upgrading to a different OS it is a real inconvenience to revert to the older one.

I installed Mountain Lion recently after re-formatting the computer, I will give my thoughts once I get some experience in working with it, already it seems slower than Lion.

Why dont you do what I have proposed :

 Make one partition with Maverick and another with ML

Install Logic on both partitions

Dont forget to update all software

and do comparaision

From what I have read Logic is said to be working faster with Mavericks

I have gave you the link to make your CD

Cyril thank you for monitoring this and sending me the link last week or so. However, I took my iMac at the shop so I could have my faulty graphics card replaced, so I asked them to also install Mountain Lion on my computer. I got it back and erased my hard drive completely so that I could erase the dummy account they had created, and start fresh. Only to my astonishment my computer cannot find my hard drive anymore, it can only see the partition with the operating system on it. I found out yet another reason why Jobs was a one-man-show genius:

Those universal twirps at Apple won't let me install ML again from the Internet because they can't associate my computer with either a Lion or ML in the App store (although I registered my computer promptly when I got it with Lion on it). And my question is: How ******* hard is it to include an OS DVD in the package, and why oh why does the system itself ERASE the installer automatically after the installation??!! Which is why I cannot use your wonderful link, for which I have to have the installer in order to create the bootable DVD. I presume the whole OS 10.8.5 is still intact in my OS partition which I can still see on my system. I just have no access to it. So Monday will be yet another wasted day of my driving down to the authorized service, screaming!

If you erase a HD it is normal you loose everyting !

If you had create a partition instead you will not be in that s...

In the good old days, when we erased/re-formatted the HD, we had a DVD from which to re-install the OS. To my understanding, this great practice was replaced recently by a separate (to the HD) partition inside the computer, in which the OS resides in case one has to re-format the HD. That partition is still there in my computer (with 10.8.5 on it), I can still access it, but it does not re-install my ML OS on its own. It asks for an Internet connection to the App store - another Mac-genius idea..... - and when I connect to that I am told that it doesn't show I have ever bought Lion! Which is true, I never bought Lion, I bought an expensive computer with Lion on it, which I did register immediately with those geniuses!

The only reason that I erased my HD in the first place is that some people in fora suggested that, yes, Mavericks is merde, but it seems to be running faster with a clean install (which wasn't the case with me). And I tell you, this situation is going to be resolved for me somehow, mostly since I did buy this computer with Lion on it and the App store's records are wrong. The question remains why do I have to go through all this, instead of them just providing a DVD in the original package, or allowing you to re-install from that separate stupid partition, without having to connect to the Internet. Not everybody wishes to live in their stupid Cloud...

You can buy it and ask after for a refund

Erik go to the Apple Store and I think you can buy Mountain Lion for about £14. 

I agree with you Erik. Apple has turned itself into a fucking shambles. 

The fact that Mavericks may or may not be better than ML according to different pople is neither here nor there. You should be able to access what you want, when you want, with ease and not be dictated to by anyone when you're the one that's paying.

Thanks guys, I'll wait until Monday so that the Apple service shop here is open, and I'll see what happens then. Enjoy your weekend.