macOS Tahoe 26.4 Adds Slow Charger Indicator for MacBooks
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| Source: Mastodon | Original article
Apple’s latest macOS release, version 26.4—codenamed “Tahoe”—adds a “Slow Charger” indicator that pops up whenever a MacBook detects an under‑powered adapter. The alert appears in the menu bar and in the Battery preferences pane, displaying a clear warning that the connected charger cannot deliver the full wattage the notebook expects. Apple’s updated support document explains that the system measures the power draw during the first few minutes of charging; if the intake falls below a threshold, the warning is shown and persists until a higher‑wattage adapter is attached.
The feature matters because many MacBook owners rely on third‑party USB‑C chargers, power strips or low‑output hubs that can halve charging speed without obvious signs. By surfacing the mismatch, macOS 26.4 helps users avoid the frustration of “slow charging” and protects battery health by encouraging the use of proper power delivery profiles. The move also aligns with Apple’s broader push for tighter power‑management controls, introduced earlier in the same update with a configurable Battery Charge Limit and the new Safari Compact Tab Bar, which we covered on March 25. It signals that Apple is willing to police the accessory ecosystem more aggressively, a stance that could influence EU and US regulator discussions on charger standardisation.
What to watch next includes whether the Slow Charger alert will be extended to iPadOS, where similar USB‑C charging issues exist, and how Apple’s upcoming hardware—particularly the rumored MacBook Pro models with higher‑wattage adapters—will integrate the warning. Developers may also receive APIs to query charger performance, opening the door for third‑party apps that suggest optimal power setups. Finally, the industry will be keen to see if Apple tightens certification for non‑Apple chargers, potentially reshaping the market for USB‑C power accessories.
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