How To Update Macos High Sierra 10136 To 1015 !new!

It looks like you want to upgrade from macOS High Sierra (version 10.13.6) to macOS Catalina (version 10.15) — I assume “10136” is a typo for 10.13.6, and “1015” means 10.15.

Here’s a clear report on how to do that update, including important prerequisites and steps.

Step 5: The Update Process

Once you have verified compatibility and backed up your data, follow these steps: how to update macos high sierra 10136 to 1015

1. Open System Preferences > Software Update on High Sierra 10.13.6.
2. You should see an option for “macOS Catalina” (10.15). If not, search the App Store for “Catalina.”
3. Click Download and allow several gigabytes to download (approx. 8 GB).
4. After the download completes, the installer will open automatically. Click Continue and agree to the license.
5. Select your startup disk and click Install. Your Mac will restart and show a progress bar. The process takes 30–60 minutes.

Step 4: Understanding Application Compatibility – The 32-Bit Apocalypse

This is the most significant hurdle when upgrading from High Sierra to Catalina. macOS Catalina completely drops support for 32-bit applications. High Sierra can still run both 32-bit and 64-bit apps. To check which of your apps will break:

1. Open System Report (Apple Menu > About This Mac > System Report).
2. Under “Software,” select “Applications.”
3. Look for the “64-bit” column. Any app listed as “No” will not launch after the upgrade.

Older versions of Microsoft Office (pre-2016), Adobe Creative Suite (CS6 and earlier), and many legacy games will cease to function. You must either find 64-bit alternatives, update to newer versions, or accept that these programs will be lost. It looks like you want to upgrade from

Method 2: Use Software Update (if offered)

• Go to System Preferences > Software Update.
• If Apple still offers Catalina for your specific Mac, it will appear. Click "Upgrade Now." Note: This is rare in 2025; Apple now pushes newer OSes or none at all for old hardware.

macOS Recovery

If you're having trouble updating directly, you can try using macOS Recovery:

1. Restart Your Mac and immediately hold down Command (⌘) + R.
2. Release the keys when you see the Apple logo or a spinning globe.
3. In the macOS Utilities window, select Reinstall macOS and follow the on-screen instructions.

Specific Version Updates

If you're trying to update to a very specific version (e.g., for compatibility reasons), you might need to use the macOS Recovery mode or download the installer directly from the Mac App Store. However, Apple usually encourages users to stay on the latest version of macOS for security and feature updates. Step 5: The Update Process Once you have

Step 4: The Upgrade Process – From High Sierra to Catalina

Once the installer is downloaded (it’s about 8 GB), follow these steps.

Important: Do not interrupt power or close the lid on a laptop.

1. Close all open apps. Save your work.
2. Disconnect non-essential peripherals (printers, USB hubs, external drives – keep only mouse/keyboard).
3. Open the installer:
   • Go to Applications → double-click Install macOS Catalina.
4. Follow the on-screen prompts:
   • Click Continue.
   • Agree to the software license agreement.
   • Select your startup disk (usually “Macintosh HD”).
5. Authenticate: Enter your administrator password.
6. The upgrade begins: Your Mac will restart, show a progress bar, and may restart two or three times. The screen may go black or show an Apple logo with a timer. This is normal.
   • Time estimate: 30 minutes to 1.5 hours depending on drive speed (HDD slower than SSD).

During restarts: Do not touch power, do not force shut down. If stuck on a progress bar for over 2 hours, then troubleshoot (see Step 6).