You might need to remove some startup programs, run updates on your system, or clean out your storage drive to fix this issue. But if none of these fixes have an effect, reinstalling macOS can likely help speed up your system. This is especially the case if your Mac is approaching a decade of life.
What happens if you reinstall macOS?
2 Answers. It does exactly what it says it does–reinstalls macOS itself. It only touches operating system files that are there in a default configuration, so any preference files, documents and applications that are either changed or not there in the default installer are simply left alone.
Will I lose data if I reinstall macOS?
2 Answers. Reinstalling macOS from the recovery menu does not erase your data. However, if there is a corruption issue, your data may be corrupted as well, its really hard to tell. … Reinatalling the os alone does not erase data.
How long does macOS reinstall take?
Depends on what kind of Mac you have and method of install. Typically, if you have a stock 5400 rpm drive, it takes about 30 – 45 minutes using a USB installer. If you are using the internet recovery route, it can take over an hour, depending on speed of internet etc.
Why does it take so long to reinstall macOS?
Since the main reason for slow OS X installs is the use of relatively slower installation media, if you are planning on installing OS X multiple times then you might benefit from using faster media.
How can I repair my Mac without losing data?
In this guide, we will teach you how to boot Mac into recovery mode and reinstall macOS without losing your data.
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How to Reinstall Mac OS?
- Step 1: Backup Files on Mac. …
- Step 2: Boot Mac in the Recovery Mode. …
- Step 3: Erase the Mac Hard Disk. …
- Step 4: Reinstall Mac OS X without Losing Data.
How do I repair a Mac installation?
Repairing a disk
- Restart your Mac, and press Command + R, while it’s restarting.
- Select Disk Utility from the macOS Utilities menu. Once Disk Utility has loaded, choose the disk you wish to repair – the default name for your system partition is generally “Macintosh HD”, and choose ‘Repair Disk’.
How do I clean and reinstall my Mac?
If you’re reinstalling on a Mac notebook computer, plug in the power adapter.
- Start up your computer in macOS Recovery: …
- In the Recovery app window, select Disk Utility, then click Continue.
- In Disk Utility, select the volume you want to erase in the sidebar, then click Erase in the toolbar.
Why is my Internet Recovery Slow Mac?
macOS Recovery. requires a broadband high speed connection. If it’s less than 10mbps, you may have a difficult time using macOS Recovery. Newer Mac computers and some older Mac computers automatically try to start up from macOS Recovery over the Internet when unable to start up from the built-in recovery system.
What do I do if my Mac is stuck updating?
Refresh the Update
Hold down the power button and wait for about 30 seconds. When the Mac is completely off, press and hold the power button again. Now, the update should resume. Press Command + L again to see if macOS is still installing.
How do I cancel a Mac update in progress?
To cancel the entire update process, locate and hold down the Option button. Within a few seconds, the Option button will change into a Cancel button. Tap the Cancel button that appeared on the screen.
How do I back up my Mac?
Open System Preferences, click Time Machine, then select Back Up Automatically. Select the drive you want to use for backup, and you’re all set.
How do you restore Internet on a Mac?
Here is how to use MacOS Internet Recovery:
- Shut down your Mac.
- Hold down Command-Option/Alt-R and press the Power button. …
- Hold down those keys until you a spinning globe and the message “Starting Internet Recovery. …
- The message will be replaced with a progress bar. …
- Wait for the MacOS Utilities screen to appear.