Generally: Computers are systems, and will perform at the speed of the slowest component within the system. And with the iMac in use here, you don’t have a fast hard disk. A slow SSD is good for ~100,000 I/O operations per second, and many SSDs are far faster. Fast hard disk disk drives are good for ~150 to ~200 I/O operations per second. The 24” iMac replacement for this 21.5” model is seriously fast, and all of the 24” models are SSD with very fast memory and very fast (non-Intel) processors.Ģ: It isn’t the processor that’s caused the performance troubles here, it’s the exceedingly slow main storage, and the lack of memory for caching to conceal some of that storage slowness. The newer Mac systems are based on Apple silicon AArch64 Arm processors, and not on Intel architecture processors.
😁ġ: Intel processors are on the way out at Apple, and the 27” iMac is one of the few remaining Intel architecture models available for purchase new from Apple. Or maybe just trade this in for a model with core 7. macOS itself does pretty well with cleaning, and reloading and transferring user data to new or rebuilt systems via backups works very well.Īs for your question, there’s a user tip for that ➡️ How to Setup and Use an External SSD as your Startup Disk on a Desktop Mac - Apple CommunityĪs discussed in that link, an external SSD on Thunderbolt or less preferably USB 3.0 (and not USB 2.0!) does pretty well for getting a few more years out of a low-spec iMac 21.5” 8 GB / hard disk configuration, pending replacement. You’re also referencing considering cleaner apps, a class of apps which tends to have a poor reputation around here. Details ➡️ Back up your Mac with Time Machine - Apple Support
Time Machine configured with an external hard disk drive of maybe 4 to 6 TB is a common choice for backups, hough there are other options. No backups effectively means that the user believes the data is worthless, or can be easily recovered or rebuilt. You have a catastrophic-level mistake in this configuration.
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