In 2026, buying or keeping a MacBook Air 2018 requires an honest assessment: it was the last Air with an Intel CPU before the jump to Apple Silicon and, seven years later, it is close to the end of official macOS support. This guide explains what to expect from the Air 2018's Intel Core i5 CPU, its real-world performance in 2026, the issues to consider and why a refurbished MacBook Air M1 from iOutlet is, in almost every case, the smarter choice — with a 24-month warranty and battery tested using specialist technical software.
In this article
- MacBook Air 2018: what it is
- Real-world CPU performance in 2026
- macOS compatibility
- Air 2018 Intel vs Air M1: the comparison that decides it
- When the Air 2018 still makes sense
- Common Air 2018 issues to watch for
- How to buy a refurbished MacBook safely
- Frequently Asked Questions
- Will the Air 2018 still receive the next version of macOS?
- Can I upgrade the RAM or SSD in the Air 2018?
- Is it worth replacing the battery in an Air 2018?
- Does iOutlet do repairs?
MacBook Air 2018: what it is
Launched in October 2018, it was the first major refresh of the MacBook Air in years: Retina display, Touch ID, a thin and lighter unibody design, and the return of the Air to the centre of the Apple range. The CPU is an 8th-generation dual-core Intel Core i5, based on the Amber Lake-Y architecture, with a 1.6 GHz base clock and up to 3.6 GHz Turbo Boost.
- CPU: Intel Core i5 (Y-series, 8th generation), 2 cores / 4 threads
- GPU: Intel UHD Graphics 617 (integrated)
- RAM: 8 GB or 16 GB LPDDR3 at 2133 MHz (soldered)
- SSD: 128 GB, 256 GB, 512 GB or 1.5 TB
- Display: 13.3" Retina 2560×1600, without True Tone on the base 2018 variant (True Tone only on later models)
- Ports: 2× Thunderbolt 3 (USB-C), headphone jack
- Battery: up to 12 hours (advertised), 6-9 hours in real-world use in 2026
- Weight: 1.25 kg
Real-world CPU performance in 2026
The 1.6 GHz Core i5 was already modest in 2018 — designed for low power consumption, not speed. In 2026, it is clearly the machine's weak point:
- Light tasks (browser with a few tabs, email, documents): acceptable
- Moderate multitasking (Chrome with 10+ tabs, Slack, Spotify): lag is noticeable
- Photo editing (Affinity Photo, Lightroom): slow
- 4K video editing: practically impossible
- Apple Intelligence: incompatible (requires M1 chip or later)
macOS compatibility
The MacBook Air 2018 runs macOS Sonoma and macOS Sequoia. The next version of macOS (probably "macOS Tahoe" 2026) may still include the Air 2018, but it is at the end of support. Realistically, in 2-3 years it will stop receiving security updates.
Air 2018 Intel vs Air M1: the comparison that decides it
| Criterion | MacBook Air 2018 (i5) | MacBook Air M1 (2020) |
|---|---|---|
| Multicore CPU | Modest | ~3-4× faster |
| Energy efficiency | Poor | Excellent |
| Real-world battery life | 6-9 hours | 10-15 hours |
| Fan | Yes (noisy) | No (total silence) |
| Apple Intelligence | No | Yes |
| macOS support | ~1-2 years | ~5+ years |
| Price range (refurb.) | ~350-500€ | ~550-700€ |
Indicative prices for the refurbished market in Portugal in 2026. Values vary depending on stock, capacity and condition.
When the Air 2018 still makes sense
- You have a very limited budget and the machine appears at an exceptional price (≤ 350€)
- You will use it for basic tasks for only another 1-2 years
- It is a second machine (family, school, casual study)
- You do not mind not having Apple Intelligence
In every other case — and that is most of them — it is clearly worth adding 150-200€ and going for the refurbished MacBook Air M1. The difference in performance, battery life, silence and longevity more than makes up for it.
Common Air 2018 issues to watch for
- Butterfly keyboard: 3rd generation, but still prone to faults; Apple repair programme has now expired
- Degraded battery: at 7 years old, many original batteries no longer exceed 60-70% capacity — buying refurbished with a tested battery is essential
- Noisy fan: tight thermal design leads to frequent fan use
- Palm rest heating: under load, the keyboard area gets quite warm
How to buy a refurbished MacBook safely
Every MacBook at iOutlet goes through more than 30 technical checks: battery tested using specialist technical software, display, keyboard, trackpad, ports, camera, speakers, microphones, Wi-Fi, Bluetooth, Touch ID, fans and SSD. macOS is reinstalled from scratch to the latest supported version. 24-month warranty on refurbished products, with direct iOutlet cover. Free delivery in up to 8 working days in Portugal and a 14-day right of return.
Frequently Asked Questions
Will the Air 2018 still receive the next version of macOS?
Probably yes, but it is uncertain. Apple's typical macOS support is 7-8 years after launch, which puts the Air 2018 close to the end. To guarantee real longevity, it is worth investing in a refurbished Apple Silicon MacBook Air.
Can I upgrade the RAM or SSD in the Air 2018?
No. RAM and SSD are soldered to the logic board. The configuration the machine was sold with is the configuration you will have forever.
Is it worth replacing the battery in an Air 2018?
It depends on the overall condition. Out-of-warranty battery replacement costs 150-250€ at external repair shops (Apple Support, iServices). If the rest of the machine is in good condition, it may be worth it; if it is close to the end of macOS support, it is better to go for a refurbished Air M1.
Does iOutlet do repairs?
No. iOutlet sells refurbished devices with a 24-month warranty. For out-of-warranty repairs, we recommend external repair shops such as Apple Support. Under warranty, iOutlet always handles it.
Ready to make a real upgrade? See all refurbished MacBooks at iOutlet — including Air M1, M2 and M3 — with a 24-month warranty, free delivery in up to 8 working days and 14 days to return with no questions asked.
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