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TOPIC: iMac slowing down

iMac slowing down 23 May 2018 14:19 #95605

  • Neil P
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Hi gang,

Sorry about the duff question but my iMac slows right down when i open FCPX., it's ok for first couple of minutes but then I get the wheel of Death and everything brings to a halt even when I have a small project on there. It's very frustrating as I have lots of room on my Mac. Any ideas, I'm supposed to edit a film this week so I'm abit stressed about it.
I've recently update the FCPX software but to be fair it was going this before.

Here ares my Macs details etc


ScreenShot2018-05-23at15.17.03.png


ScreenShot2018-05-23at15.16.41.png
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iMac slowing down 23 May 2018 15:34 #95607

  • JarrodMFay
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Couple quick questions to get a better idea. Are you editing from an external drive? If so, what type? What type of footage are you editing with primarily? Was your OS update a clean one or just added to your existing system?
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iMac slowing down 23 May 2018 17:06 #95608

  • joema
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Neil P wrote:
...my iMac slows right down when i open FCPX., it's ok for first couple of minutes but then I get the wheel of Death and everything brings to a halt even when I have a small project on there...

FCPX performance can be significantly affected by the library size and complexity. E.g, if you have many saved project snapshots, it can be quite slow to open. If the machine or FCPX has crashed or hung several times it might have corrupted something inside the library.

It's often good to trash user preferences as described in this article, then create and open an empty library and import a few clips. support.apple.com/en-us/HT203477

Remember after doing this you'll have to reset all desired user prefs such as turning off background render, disable "copy files to library", disable create proxies for multicam (assuming you want that), etc.

See if that is slow. If the problem continues, you could try copying your small project from your current library to the new test library. If you drag/drop that it will copy over only the required media for that project. Consolidate that new library to make sure all needed media is there, then close the old library, restart FCPX, open the new library with the small project and its media and see if that's slow.

As Jarrod said, if any of your media is on an external drive, eliminate that by creating the new test library on your Mac HD, then disconnecting your external drive. If the problem goes away look at the external drive more closely, e.g, run Black Magic disk test and examine performance, run Disk Utility First Aid to ensure it's OK, etc.
Last Edit: 23 May 2018 17:06 by joema.
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iMac slowing down 23 May 2018 18:43 #95609

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Hi

I used to put my footage on an external hard drive and connect via Thunderbolt . As it was running slow I now keep my footage on my mac, but it still runs slow. My footage is average footage, not 4K raw or anything.
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iMac slowing down 23 May 2018 18:48 #95610

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Thanks for your advice,

I'll check out the article.and do a few tests.
I do create a new Library on every project so my Library are fairly small.

Neil
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iMac slowing down 23 May 2018 19:19 #95611

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Neil P wrote:
...
I do create a new Library on every project so my Library are fairly small....

If you don't close your many libraries, it costs FCPX some overhead to open them all when starting up.

Since each library is an independent island of data, it can become very cumbersome to have related material spread across multiple libraries. But if each of your overall projects are unrelated and you don't need to query for past clips, that's less an issue.

So you have everything on the system drive. Is that Fusion, SSD or what? Can you run Black Magic disk test on it to check performance?
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iMac slowing down 23 May 2018 19:42 #95612

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The projects are unrelated. It's a Fusion Drive so half SSD (if that makes sense ?)
Is Black Magic Disk test a free download ?

Neil
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iMac slowing down 23 May 2018 19:52 #95613

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Neil P wrote:
The projects are unrelated. It's a Fusion Drive so half SSD (if that makes sense ?)
Is Black Magic Disk test a free download ?...

Yes it's free: itunes.apple.com/us/app/blackmagic-disk-...st/id425264550?mt=12

There are three Fusion Drive sizes, 1TB, 2TB and 3TB. Which one is it, and how much empty space?
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iMac slowing down 23 May 2018 19:55 #95614

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Hi , I did a speed test but I have no idea if the test is good or not or what it is telling me. Take a look at the screen grab, any thoughts ?
Last Edit: 23 May 2018 19:56 by Neil P.
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iMac slowing down 23 May 2018 19:56 #95615

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Neil P wrote:
Hi , I did a speed test but I have no idea if the test is good or not or what it is telling me. Take a look at the screen grab, any thoughts ?

I don't see it, just type in the read/write numbers in a post.
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iMac slowing down 23 May 2018 19:57 #95616

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Write 362.8
Read 1322.1
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iMac slowing down 23 May 2018 20:02 #95617

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OK that performance should be good enough. What size is the drive and how much free space?
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iMac slowing down 23 May 2018 20:07 #95618

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Check out my first post at the top of this thread, is that the correct info ?

Sorry, I can't seem to upload pics at the moment

Neil
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iMac slowing down 23 May 2018 22:38 #95619

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Sorry, I missed that. Your free space is OK, also Black Magic perf. is OK. The next step is trash FCPX prefs as indicated in the article, and try a single test library with just your project and media for that project.

If that's still slow, then remove all effects from that test project and try that: support.apple.com/kb/PH12615?locale=en_US&viewlocale=en_US
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iMac slowing down 23 May 2018 22:44 #95620

  • JarrodMFay
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If all of this doesn't speed things up then consider doing a clean install of High Sierra and reinstalling FCPX first. Then test it for speed. Assuming it's faster then, install other apps/plugins one at a time and test FCPX speed as you go to see if one of them is slowing it down. Most likely it would only be related items like FCPX plugins but you never know. Good luck!
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iMac slowing down 24 May 2018 05:43 #95622

JarrodMFay wrote:
… consider doing a clean install of High Sierra and reinstalling FCPX …

sorry this snarky comment, but that's a habitual ritual on inferior systems ;)

A good start is this list:
support.apple.com/en-us/HT203477

Next, aside hardware checkups, some simple basics, e.g. switching of Background Render (… error description in OP) …

… that re-install-advice, imho, in just very, very cases fixes anything …
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iMac slowing down 24 May 2018 12:58 #95631

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Interesting. Until last year I was using a 2010 Mac Pro loaded down with many applications, plugins, etc.. I was experiencing lagging performance in FCPX. After trying all the usual tricks, I did a clean reinstall of the OS and just loaded back the items I really needed and I saw a very noticeable increase in FCPX speed. I've also heard that advised by several FCPX expert users over the years. Maybe it's just the placebo effect at work but my experience was enough for me to recommend it to others.
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iMac slowing down 24 May 2018 14:30 #95636

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What to you mean by a clean reinstall of the OS ?

thanks

Neil
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iMac slowing down 24 May 2018 14:38 #95637

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When you install the OS you have the option of installing it while leaving all other files in place or doing a "clean install" where it deletes everything and starts over with no files saved. It will be like you just bought the computer and you'll have to reinstall all of your apps, etc.. Obviously you should do a thorough backup of your drive before doing this procedure in case you need to save any of your files.
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iMac slowing down 25 May 2018 03:37 #95645

  • dgwvideo
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If the OP is still having problems, I would suggest trying #9 in the Apple support document - create a new user account. Report back if that makes any difference before doing anything else.
Creating history....one edit at a time !
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