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Late 2015 Retina iMac has Catalina. Upgrade the OS? Wait for Monterey?
Posted by: stephen
Date: October 11, 2021 11:31PM
Honestly hoping to buy a new iMac as soon as the new large models come out, but want to get maximum efficiency now. Getting a lot of beach balls in Safari. Have about 260 gb clear on a 2 TB Fusion Drive.



Edited 1 time(s). Last edit at 10/11/2021 11:31PM by stephen.
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Re: Late 2015 Retina iMac has Catalina. Upgrade the OS? Wait for Monterey?
Posted by: N-OS X-tasy!
Date: October 11, 2021 11:40PM
Download and install Firefox, wait until the bugs shake out of Monterey, skip Big Sur.



It is what it is.
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Re: Late 2015 Retina iMac has Catalina. Upgrade the OS? Wait for Monterey?
Posted by: jdc
Date: October 12, 2021 12:35AM
Quote
N-OS X-tasy!
Download and install Firefox, wait until the bugs shake out of Monterey, skip Big Sur.

As good advice as any.

260 GB doesn't seem small, but prob is. Could be a big chunk eating at the 128 GB flash drive part. If you can go with a separate boot drive, you could try a 1 TB NVMe, about $100, see if that helps.

Really seems more like a safari issue... how many tabs, tons of videos?

I use FF for days to day browsing, and safari for video only -- hulu, yt, netflix, amazon, hbomax and it runs fine. 2014 iMac.





Edited 999 time(s). Last edit at 12:08PM by jdc.
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Re: Late 2015 Retina iMac has Catalina. Upgrade the OS? Wait for Monterey?
Posted by: Sarcany
Date: October 12, 2021 01:00AM
I would not upgrade the OS on that machine.

You do not cure slowdowns by installing a new operating system. You are just compounding the problem with whatever slowdowns and bugs come with the new operating system.

Catalina is notoriously slow on Fusion drives.

Big Sur is worse. Monterey will be worse.

If it seems slower than usual, run a SMART check to ensure that your drive is not failing, run a Malwarebytes scan to check for malware, and if it passes both then do a safe boot to clean some caches.







Edited 1 time(s). Last edit at 10/12/2021 01:01AM by Sarcany.
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Re: Late 2015 Retina iMac has Catalina. Upgrade the OS? Wait for Monterey?
Posted by: anonymouse1
Date: October 12, 2021 10:11AM
Yeah, if you're getting beachballs, installing a new OS isn't the cure.

First, you have a current backup, right? Right?

Then...
I'd try running Onyx to clear caches, etc.
I'd repair the drive in Disk Utility
I might even reinstall the current OS
Maybe reseat the RAM and blow out dust bunnies.
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Re: Late 2015 Retina iMac has Catalina. Upgrade the OS? Wait for Monterey?
Posted by: sekker
Date: October 12, 2021 04:42PM
The speed issues are due to the main drive system being functionally full.

Not exactly sure about Fusion drives, but straight SSDs start losing speed once 75% full.

I am typing on a slightly newer version of that machine - a 2019 model - and it runs fine under Catalina. But I an only 40% full of a 2TB Fusion drive.
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Re: Late 2015 Retina iMac has Catalina. Upgrade the OS? Wait for Monterey?
Posted by: Sarcany
Date: October 12, 2021 07:03PM
Quote
sekker
The speed issues are due to the main drive system being functionally full.

Not exactly sure about Fusion drives, but straight SSDs start losing speed once 75% full...

Fusion drives constantly rejigger the contents of the SSD to optimize performance. Typically, just the OS and applications and small recently-used files will reside on the SSD. There's good and bad about this with the best being pretty decent boot-times and the worst being slowdowns coming from accessing those files that reside on the HD.

Also, Fusion drives are more likely to fail than other drives because there are two separate drives that can go south vs one. So, don't forget that SMART check.

[www.volitans-software.com]



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