iMac 27 is extremely slow despite replacing HDD with SSD

I've owned an iMac 27" 5K (2019) 1TB i5 3GHz 6-core with 24GB RAM for over 2 years. It was running super slow after a few months of use and I replaced its HDD with a 512 GB SSD at the Apple Store.

It became much faster but again after about a month of use, same problem occurred. Every single task takes forever to launch. Colored wheel at every task even typing this is slower. The computer is literally becoming a pain to use.

I own a MBP 14" with half the RAM and same SSD but with M1 Pro and also for 2 years with heavier use and never had a single issue with it.

I did not import a Time Machine backup on purpose in case there was any corrupt file. I did a clean install and installed apps from the App Store. No third party apps. HD use is barely 35% of the 512.

Running latest Sonoma OS.

I gave up and installed CleanMyMac in hopes to improve the situation and ran every single task possible. No change.

HELP PLEASE!

iMac (2017 – 2020)

Posted on Mar 4, 2024 12:59 AM

Top-ranking reply

HWTech

Level 9

69,530 points

Posted on Mar 5, 2024 8:53 AM

rkaufmann87 wrote:

Next the report indicates your HD is failing.

Actually the internal drive was replaced with a 500GB Crucial BX500 SSD which is an awful SSD (Crucial should be embarrassed to ever have made it as it tarnishes their reputation for quality & reliability). Have whoever installed that Crucial BX500 SSD replace it with a quality Crucial MX500 series SSD. The Crucial BX500 series SSD is a low end budget economy model that is as slow as a hard drive, overheats easily, and has an extremely high rate of failure.

The Crucial MX500 series SSD is Crucial's top of the line model for 2.5" models and is a good choice for price & performance.

I would rethink your choice of repair shops if it was their choice to actually use the BX500 SSD.

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iMac 27 is extremely slow despite replacing HDD with SSD

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