Which iMac 24-inch M4 model is optimal, especially between a machine with 2 vs. 4 Thunderbolt ports?

Here is the definitive ranking of these three M4 iMac configurations, ordered from the most optimal (best overall value and longevity) to the least desirable.

🥇 #1: The $1899 Model (Silver, 10-Core, 512GB SSD)

Verdict: The Optimal Machine

This configuration is the clear winner for long-term usability and daily comfort. While all three models are future-proofed with 16GB of memory to handle Apple Intelligence, this is the only model in the lineup that pairs that memory with a healthier 512GB SSD.

 Why it’s the best: A 256GB drive fills up incredibly fast once you account for the macOS operating system, caching, local files, and apps. The 512GB capacity gives you a comfortable cushion.

 Performance & Connectivity: You get the fully unthrottled M4 chip (10-Core CPU / 10-Core GPU) and 4 physical Thunderbolt 4 ports, which gives you maximum flexibility for external devices and dual-display setups. It also natively includes a Gigabit Ethernet port in the power brick and a Touch ID keyboard.  

🥈 #2: The $1699 Model (Blue, 10-Core, 256GB SSD)

Verdict: The Middle Ground (Great Performance, Tight Storage)

This model sits in the sweet spot for pure processing power, but its smaller storage capacity holds it back from the top spot.

 The Good: For $200 less than the top model, you still get the premium 10-Core CPU and 10-Core GPU, meaning its graphical and processing speed is identical to the $1899 machine. You also keep the 4 Thunderbolt 4 ports, Gigabit Ethernet brick, and Touch ID keyboard.

 The Catch: You are limited to 256GB of storage. If you primarily work in the cloud, stream your media, and don't mind plugging in an external SSD down the road for larger files, this is an excellent high-performance option.

🥉 #3: The Base Model (Blue, 8-Core, 256GB SSD)

Verdict: Least Desirable (The "Binned" Budget Option)

While this machine will still run beautifully for basic web browsing and email, Apple cuts several crucial hardware features to hit its lower price point, making it the least desirable option for longevity.

 Processor Cuts: To create this entry-level model, Apple uses a "binned" chip, cutting the processor down to an 8-Core CPU and 8-Core GPU. It is roughly 12% slower in heavy multi-threaded tasks and has less graphical muscle.  

 Hardware Limitations: * You only get 2 physical ports on the back instead of 4.

 The power brick does not include an Ethernet port (it is a Wi-Fi-only machine unless you buy a separate adapter or dock).  

 The included Magic Keyboard lacks Touch ID (biometric fingerprint scanning), forcing you to type your password manually.

 Storage: It is tied to the restrictive 256GB SSD.

Summary Recommendation

If your budget allows, go with the $1899 model. The combination of the unthrottled 10-core chip, the 4-port connectivity suite, and the vital jump to 512GB of storage ensures this desktop will remain fast and usable for years to come.

I would suggest getting at least 512 GB of storage. That’s the amount that I have on my Mac, and the internal drive is already over half full, even though my Music and TV libraries are on an external drive. If 256 GB had been an option and I had chosen it, I would not be in a fun place now.

As for two vs. four Thunderbolt ports, those multi-purpose USB-C (USB 3, USB4, DisplayPort, Thunderbolt) ports are very useful. If you get the two-port model, you will likely find yourself in need of a hub or dock sooner, rather than later.

3-2-1.

In my humble opinion, people that buy a computer with 256 GB disk will learn to regret that. It is likely not enough for the coming years. As it is soldered onto the main board, it is not upgradable later. Get as much disk capacity as you can afford.

Rather than any of those two iMacs consider the following:  a 10 Core Mac Mini M4 with 16 GB RAM and 1 TB SSD ($1299 US) with a 32" LG 4k monitor with speakers ($318 US) from Amazon.com)  is $1517 US which is $512 less than a similarly configured new 24" iMac ($2029 US).  Keep your keyboard and mouse from your current Mac for use with the Mini. 

I got the above Mini with a 32" LG 4K monitor w/speakers for the same price as a 27" monitor (didn't know the Mini had a speaker).  There are many monitors available in 27" size for about $100 US to $500 US depending on what features you want.  The prices are before tax, tariffs and the Strait of Hormuz.

I had an 2017 i7 iMac with an SSD boot drive and the new Mini runs circles around it.  So much faster.  

You can use the keyboard and mouse from your current iMac.  And I would never get a Mac with less than a 1 TB boot drive. And you can save even more money if you go with a 27" 4K monitor.

Urquhart1244 wrote:

3-2-1.

In my humble opinion, people that buy a computer with 256 GB disk will learn to regret that. Get as much disk capacity as you can afford.

Plus it makes importing user data from a larger drive nearly impossible.