To improve the lifespan of your battery, Optimized Battery Charging allows your Mac to learn from your daily charging routine so that it can delay completing a full charge in certain situations. And with Charge Limit, you can limit what your Mac considers a full charge.
A battery’s lifespan is related to its chemical age, which is more than just the length of time since the battery was assembled. A battery's chemical age results from a complex combination of factors, including temperature history and charging pattern. All rechargeable batteries are consumable components that become less effective as they chemically age. As lithium-ion batteries chemically age, the amount of charge they can hold diminishes, resulting in reduced battery life and reduced peak performance.
Optimized Battery Charging is designed to reduce the wear on your battery and improve its lifespan by reducing the time that your Mac spends fully charged. It uses on-device machine learning to learn your daily charging routine so that it can delay charging past 80% in certain situations, such as when it predicts that your Mac will be connected to power for an extended period of time. Optimized Battery Charging aims to ensure that your Mac is fully charged by the time it expects you to need a full charge. To limit what your Mac considers a full charge, on macOS Tahoe 26.4 or later, you can also set a Charge Limit (see below).
When charging past 80% is delayed by this feature, "Charging On Hold" appears in the battery status menu. If you need your Mac to be charged to 100% sooner, choose "Charge to Full Now" from the menu.
To turn this feature off or on, use the Optimized Battery Charging setting in Battery settings. For example, in macOS Ventura 13 or later:
• From the Apple menu , choose System Settings
• Click Battery in the sidebar
• Click the info button next to Charging (or Battery Health)
• Turn Optimized Battery Charging off or on (when you turn it off, you can choose whether to turn it off only until tomorrow)
• Click Done
Whether using Optimized Battery Charging or Charge Limit, your Mac will occasionally charge to 100% to maintain accurate battery state-of-charge estimates.
Use Charge Limit to set a limit on what your Mac considers a full charge. Your Mac will charge to within a few percentage points of the charge limit, then stop charging and show "Charged to [%] Limit" in the battery status menu. If the battery charge level drops more than 5% while connected to power, charging resumes, again charging to within a few percentage points of the limit.
If your Mac is charged to the limit but you need it to be charged to 100%, choose "Charge to Full Now" from the battery status menu.
To set a charge limit:
• From the Apple menu , choose System Settings
• Click Battery in the sidebar
• Click the info button next to Charging
• Choose a Charge Limit setting between 80% and 100%
• Click Done
Many apps automatically save versions of documents as you work on them. Apple offers a built-in feature for its document-focused apps, like Pages and Numbers, and a framework that some other developers tie into as well. It resembles Time Machine, but doesn’t require that you are using a Time Machine backup.
A version is saved automatically every hour, or more frequently when you’re making many changes, when you open, save, duplicate, lock, rename, or revert a document. You can also explicitly save a version.
To browse, restore, duplicate, and delete versions:
1. Open the document, then choose File > Revert To > Browse All Versions.
2. Click tick marks along the timeline to browse versions.
3. Display the version you want, then do one of the following:
• Restore your document to this version: Click Restore
• Duplicate this version in a new document: Press and hold the Option key, then click Restore a Copy
• Delete this version: Move the pointer to the top of the screen to show the menu bar, then choose File > Revert To > Delete This Version
• Leave your document as is: Click Done
To revert a document to the last opened version:
Open the document, choose File > Revert To, then choose Last Opened, Last Saved, or Previous Save
To explicitly save a version:
Open the document, then choose File > Save. To save the document using a different filename, location, or format, press and hold the Option key, then choose File > Save As
If you suspect a hardware component is not working properly, you can let your Mac scan your system and find which hardware component is failing.
Your Mac includes a built-in tool called Apple Diagnostics (formerly called Apple Hardware Test). This tool will be handy if you are dealing with a hardware issue and not a software issue. You can use it to find and diagnose issues with your Mac’s internal hardware such as the Wi-Fi hardware, the Bluetooth hardware, Touch ID, the fan, or the power adapter, etc.
Prepare your Mac
• If you can install the latest macOS updates (https://support.apple.com/en-us/108382)
• Disconnect all external devices except keyboard, mouse, display, Ethernet connection and connection to AC power
• Determine if you have an Apple silicon Mac or an Intel Mac, go to the Apple menu > About This Mac to find out (on a Mac with Apple silicon, About This Mac shows an item labeled Chip, followed by the name of the chip, on an Intel-based Mac, About This Mac shows an item labeled Processor, followed by the name of an Intel processor)
• Shut down your Mac (if you can't shut it down normally, press and hold its power button for up to 10 seconds, until your Mac turns off - every Mac has a power button; on laptop computers that have Touch ID, press and hold the Touch ID button)
• Turn off your Mac, then wait a few seconds for your Mac to completely turn off
On an Apple silicon Mac
• Press and hold the power button on your Mac (on laptop computers that have Touch ID, press and hold Touch ID)
• As you continue to hold the power button, your Mac turns on and loads startup options
• When you see Options, release the power button
• Press and hold Command (⌘)-D on your keyboard until your Mac restarts
On an Intel Mac
• Turn on your Mac, then immediately press and hold the D key on your keyboard as your Mac starts up (if using the D key doesn't work, press and hold Option (⌥)-D at startup instead)
• Release the key when you see a progress bar or you're asked to choose a language
Run Apple Diagnostics
Follow the onscreen instructions, which vary based on your Mac, the version of macOS that it’s using, and whether certain parts of your Mac have been repaired or replaced.
As you follow the onscreen instructions:
• If your Mac isn’t already connected to the internet, you’re asked to choose a Wi-Fi network, or you can use an Ethernet cable to connect to your network
• If asked to review terms and conditions, you might be given the option to run diagnostics offline (in that case, click Run Offline)
• In macOS Tahoe 26 and later, you’re asked to choose a specific diagnostic to run, such as a diagnostic for your built-in display, keyboard, or trackpad; in earlier versions of macOS, this is automatic
When testing is complete, Apple Diagnostics shows the results. If you see one or more reference codes and need more explanation, refer to the list of Apple Diagnostics reference codes (https://support.apple.com/en-us/102334).
If you can't use this information to resolve the issue on your own, you might need service (https://getsupport.apple.com/?caller=kbase). Provide the reference code you receive from the test when taking your Mac to an Apple Authorized Service Provider, Apple Store, or an Independent Repair Provider. Genuine Apple parts are also available for out-of-warranty repairs through Self Service Repair (https://support.apple.com/self-service-repair).
Using symbol and text substitution, you can easily write any special character or symbol like ™ or ® just by typing something like TM or (r). You can adjust this and set your own, and it's very easy to configure.
• Open "System Settings..." from the Apple menu
• Go to "Keyboard"
• Click on the "Text Replacements..." button
• Adjust text to replace with a symbol or add more text to replace by hitting the plus (+) button
• Click "Done"
For example, if you set "JS" to be replaced with "John Smith", anytime you type JS and hit space the text will be replaced.
Split View is a useful feature in macOS that lets you split the screen between two different applications or windows, in complete full screen mode. Split View is appreciated by many users who find it to boost productivity and focus, particularly if they already enjoy and appreciate full screen app mode on the Mac.
Split View is accessed slightly different with macOS Tahoe, unlike the original implementation releases, you now have to go into a sub menu to access it:
• Open whatever applications or windows you want to use
• Click and hold on the Green button in the title bar to bring up the window options
• Go to "Full Screen" submenu and choose “Left of Screen” or “Right of Screen”
• The opposite panel will now open into Expose where you can select another open app or window to split the screen with in Full Screen mode
You can resize either the left or right split view panel using the slider button in the middle of the screen. To exit Split Screen Mode in full screen, simply pull the cursor to the top of the screen and access the Green buttons again, or press/hold the Escape key.
