Confirmed that EFI Firmware in Catalina 2021-003 and Mojave 2021-004 are indeed in sync with Big Sur 11.4 and that none of the Macs that don’t support Big Sur got any EFI Firmware updates either since the last round of security updates. Like Liked by 1 person.

When Apple announced that they were releasing macOS Catalina soon, many Apple users got so excited. They wanted to install Catalina as soon as it was out. Of course, they looked forward to trying the latest offerings of the new macOS version.

• MacOS Catalina 10.15.7 Supplemental Update –– Restart Required. MacOS Catalina 10.15.7 Supplemental Update is recommended for all users and improves the security of macOS.
• Fix it by installing the app and extension updates that are compatible with Catalina. To update apps and extensions, follow these steps: Go to the Apple menu. Select System Preferences. Choose Software Update to check for any updates. If an update is available, click the Update Now button next to it to start the installation.

Well, when Catalina was released, there was a lot of great feedback. But like many other macOS versions, it also had its fair share of bad feedback. While some users had a hard time installing it, others experienced random problems and errors, such as Bluetooth issues in macOS Catalina.

According to some users, Bluetooth disconnects every now and then. Others reported that they simply cannot connect any Bluetooth devices after updating to Catalina. Some also said that their audio output disappears and returns randomly.

What Causes Problems with Bluetooth in Catalina?

Bluetooth not working in Catalina? There are many possible culprits behind that.

Pro Tip: Scan your Mac for performance issues, junk files, harmful apps, and security threats
that can cause system issues or slow performance.

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Bluetooth is among the breakthrough technologies of the past decade. Now it usually comes packed into our devices, including our Windows computers, mobile devices, and Macs.

The technology’s primary function is to transmit data over a short distance. Because of its tremendous success, it is now being used in various accessories, such as headsets, mice, speakers, keyboards, and Apple Watch.

Unfortunately, the Bluetooth utility on Macs is quite prone to problems. Most of the time, they are caused by third-party apps and accessories that use the Bluetooth technology for data transmission.

With all the complaints and reports about Bluetooth issues on Catalina, it’s obvious that Apple’s Bluetooth framework requires a complete overhaul. But while Apple is at it, we can try a couple of handy and quick fixes that can help get back our Bluetooth devices up and running as they are supposed to do.

How to Fix Bluetooth Problems in Catalina

If you’ve just updated to Catalina, we are happy to share some possible fixes that are worth trying. Here you go:

Fix # 1: Switch it on and off.

Yes, it might sound like a broken record. But this fix is worth trying. Switch Bluetooth on and off and check if your Bluetooth accessory works. Oftentimes, a simple toggle of the switch is all your Mac needs.

Here’s how to switch on your Mac’s Bluetooth:

1. Open Bluetooth settings.
2. Click on the Bluetooth icon.
3. Toggle on the switch.

If it doesn’t work, reboot your Mac. Go to the Apple menu and hit Restart. Once your Mac has booted back up, reconnect your Bluetooth peripherals.

Fix #2: Delete the Bluetooth plist file.

If the problem persists after making sure that Bluetooth is switched on, try deleting the Bluetooth plist file.

Follow the instructions below for a step-by-step guide:

1. Open Finder.
2. Click Go.
3. Select Folder.
4. Into the search tab, input /Library/Preferences.
5. Locate the com.apple.Bluetooth.plist file and delete it. Don’t worry because your Mac will automatically create a new copy of the file.
6. After deleting the file, restart your Mac.

Fix #3: Reset the PRAM.

The Parameter Random Accessory Memory, or the PRAM, stores your Mac’s system settings, including the speaker volume, display, time zone, Bluetooth, and a lot more. This means resetting it might just resolve the problem.

Here’s how to reset your Mac’s PRAM:

1. Switch off your Mac.
2. Press the Power button.
3. Before the gray screen even appears, hit the CMD, Option, P, and R keys together. Hold them until you hear the startup sound twice.
4. Now, you can release the four keys.

Fix #4: Check if an external Bluetooth peripheral is faulty.

There are times when Bluetooth devices and peripherals may become suddenly unresponsive on Macs. But this does not mean you have to completely get rid of them. Sometimes, you can fix the problem by simply disconnecting any USB devices on your Mac, including USB mice, keyboards, external hard drives, and flash drives. After that, reboot your computer. Wait for five minutes before reconnecting your USB accessories.

This fix has worked for some Catalina users. Doing so might also bring back your Bluetooth devices’ responsiveness.

Fix #5: Reset the Bluetooth module of your Mac.

If none of the first four fixes worked, be prepared to do some re-configuration on your Mac. This is because you will have to reset your Mac’s Bluetooth module.

To reset your Mac’s Bluetooth module, just follow the instructions below:

1. Press and hold the Shift and Option keys while clicking on the Bluetooth menu.
2. Next, navigate to Debug and select Remove all devices to remove and disconnect all paired Bluetooth devices.
3. Open the Bluetooth menu once again and go to Debug.
4. Choose the Reset the Bluetooth module option to reset the Bluetooth module of your Mac.
5. After that, you may now re-pair all your Bluetooth peripherals.

Fix #6: Delete recently downloaded or installed files.

Did you also download new applications recently? It is likely that one of them, and not Catalina, has caused your Bluetooth files to be corrupted. It could be a virus, a malware entity, or an app that is messing with your Bluetooth configuration. The best way to get around this problem is to remove any recently installed or downloaded files.

The easiest and most convenient way to do this is to use a third-party Mac cleaning tool. In just a few clicks, any unnecessary files can be completely removed.

Sure, you can also delete unwanted downloads the manual way. However, we don’t really recommend doing so, especially if you are not a tech-savvy individual, as there is a high chance that you might end up deleting an important system file.

Should you wish to delete downloads manually, follow the steps below:

1. Go to Finder.
2. Press the CMD + Shift + G combination.
3. Into the text field, input: ~/
4. Navigate to the Downloads folder. From here, delete any unnecessary files you see.

Fix #7: Contact Apple Support.

Have you tried all the fixes above? Still unable to fix the problem? Then it is possible that the problem is with your hardware.

When it comes to hardware issues, we suggest that you seek assistance from AppleCare or any authorized Apple repair center.

Wrapping Up

At this point, we hope that your Catalina Bluetooth problem has been resolved already. If not, seek help from Apple experts or the manufacturer of the problematic Bluetooth device itself. Make sure to provide all important details that will help experts make a concise assessment of the problem.

Do you know other potential fixes to the Catalina Bluetooth problem? Let us know in the comments!

Catalina Patcher Firmware Update Required Free

MacOS Catalina, macOS Mojave, and macOS High Sierra download directly to your Applications folder as an app named Install macOS Catalina, Install macOS Mojave, or Install macOS High Sierra. If the installer opens after downloading, quit it without continuing installation. Hint: before reading the guide (How to Install macOS Catalina On VirtualBox On Windows), it is suggested to browse into the necessary File part of the article and get macOS Catalina 10.15 then, and you will have time to browse the post before downloading has finished. When you are downloading macOS Catalina Virtual Machine image file and Google Drive touches its download limit, then right-click on the file and choose COPY to make a copy in the Google Drive of your own. From here download the macOS Catalina virtual image file. Moreover, we have provided an alternative link of media fire too. MacOS Catalina 10.15.4 introduces iCloud Drive folder sharing, Screen Time communications limits, Apple Music time-synced lyrics view, and more. The update also improves the stability, reliability.

macOS Catalina 10.15 is the latest operating system that runs on Apple Mac laptops and desktops. However, it is still in beta test and only available for part of Mac computers with high profile or enrolled in Apple Beta Program. Is there any way to upgrade the macOS to Catalina manually or install Catalina on Mac from scratch? The answer is Yes. But you have to download macOS Cataina DMG or the installer app.

If you are looking for the easiest way to download macOS Catalina DMG on a Macand but don't know how? Well, there are three ways by which you can instantly get the latest macOS installer without a hassle.

Part 1. Get MacOS Catalina DMG Via Direct Download Link

Many people prefer the direct download link of macOS Catalina as it is more flexible. You can unpack the DMG file and make a bootable Catalina installer USB, which can be used to install macOS on other computers. However, it is not easy to find the direct download link because Apple wants you to upgrade from Mac App Store. Fortunately, there are a few good websites that host the direct download link of macOS Catalina DMG. After that, you can burn the macOS dmg to USB to make it bootable for installation.

macOS Catalina 10.15 DMG Download Link 1: https://themacgo.com/macdownload/ (Wait a few seconds and the download starts automatically.)

macOS Catalina 10.15 DMG Download Link 2: https://drive.google.com/drive/folders/1ELQXMuuVWddamLPG0RHjyvaNW4r628CM (Password: Geekrar.com)

macOS Catalina 10.15 DMG Download Link 3: http://www.mediafire.com/file/wazr84baudhi27h/macOS_Catalina_DMG_by_Geekrar.rar/file

macOS Catalina 10.15 DMG Download Link 4: https://sundryfiles.com/G54 (Premium account required for download!)

macOS Catalina 10.15 InstallESDDmg PKG Download Link : http://swcdn.apple.com/content/downloads/61/56/041-83630-A_8RCIBB415Y/7jqh3nh97ood2mjej7hdgpx7fgh5c3fi9g/InstallESDDmg.pkg

macOS Catalina 10.15 VMware Image Download Link: https://www.mediafire.com/file/yrd1py7od5911zt/Catalina_Virtual_Disk_Image_by_Techsviewer.rar/file

macOS Catalina 10.15 VirtualBox Image Download Link: https://www.mediafire.com/file/yrd1py7od5911zt/Catalina_Virtual_Disk_Image_by_Techsviewer.rar/file

Tips: After downloading macOS Catalina .dmg file, it is time to make a macOS bootable USB from it. For this purpose, you can give a try on UUByte DMG Editor, one of the most popular software to create a Catalina USB installer on both Windows PC and Mac.

Part 2. Download macOS Catalina From Mac App Store

Apple always recommends its users downloading macOS install file from Mac App Store for security reasons. It is safe and easy. But the actual downloaded file is not an dmg file. Instead, it is an app called Install macOS Catalina, which is used to make the upgrade from current macOS to Catalina. For a clean install, it is better to download the dmg file and make an installer USB.

Note: Make sure to back up your Mac prior to installing macOS Catalina.

Step 1: Go to Mac App Store and search macOS Catalina. Then hit on 'Get' to download page.

Step 2: Doing this will open System Preferences followed by the section of Software Update, where you will find MacOS Catalina ready to download. Hit the option saying 'Upgrade Now' and download MacOS Catalina on your Mac.

Step 3: Next, macOS Catalina upgrade will ask for system reboot. Complete the process and install macOS Catalina on that computer.

Downloading macOS Catalina Install app works fine on my of newly devices but it could be problems for old Macs even it is officially supported by Catalina. If this is the case, then you have to patch the OS and install Catalina again. However, you need find a third-party app to do the dirty work. We will talk about this in Part 3.

Part 3. Download macOS Catalina 10.15 Installer with macOS Catalina Patcher

Although it may appear easy to try out the conventional approach of downloading macOS update in Software Update, there are a few known issues on old Macs shipped in 2013 or earlier, meaning the download progress can not be completed successfully. That's why macOS Catalina Patcher tool comes into help. This patching tool makes the job even simpler for installing macOS Catalina on unsupported Mac models.

However, the file size of these updates differs depending on the Mac device you are using. That means the downloaded update might not necessarily be the full installer version. For instance, if you wish to keep the installer file as archive for further application, or use it to generate bootable flash drive, this file size won't be sufficient.

Fortunately, with macOS Catalina Patcher tool, you can simply download the entire update of macOS setup from Apple's servers. Let's check out the stepwise instructions of how to use this software tool to download the macOS Catalina DMG.

Step 1: Download a copy of macOS Catalina Patcher from this link.

Step 2: After downloading and attempting to install, an error notification will be prompted. It is due to the unavailability of developer verification credential for macOS. Now, go to System Preferences -> Security & Privacy. Then find the button saying 'Open Anyway' to let the app run.

Step 3: Open macOS Catalina Patcher app and from the main menu, navigate to Options to uncheck the box saying 'Auto-apply Post Install Patches'. As you are done with the previous step and move to the screen as in the link below, hit Download a Copy.

Step 4: The following screen will notify the file size of macOS Catalina you are to download. The resolution is around 7GB and after the download, it will automatically get stored in the Downloads folder. Then hit Continue to initiate the process of download.

Step 5: The download time of the file will depend upon the internet connection and its speed. So, you might have to wait for some while for the process to complete. Eventually, the entire macOS Catalina setup file will be available on your device.

Closing Words

Well, that is all for the day. Hopefully, the above methods were helpful in guiding you on how to download macOS Catalina for both supported and unsupported Macs. When the download is finished, the next step is to burn the DMG file to USB. Then boot macOS from USB and starts the installation wizard.

It does not matter whether you use macOS or Windows 10. It’s just a matter of time until your device will refuse to start, which could happen for many reasons, including (and not limited to) file corruption, hardware failure, and buggy update. If the unexpected happens with an Apple computer, you can use a macOS bootable USB with the installation media to repair it.

This is one of the main reasons you should consider making a macOS bootable USB when your device is working properly. However, if none of your devices (MacBook, MacBook Air, MacBook Pro, iMac, Mac Pro, or Mac Mini) aren’t working when you need them the most, then you can use a PC to rescue your Apple device. You can use a Windows 10, Windows 8.1, or Windows 7 device to quickly create a USB bootable installation media to reinstall macOS Catalina or Big Sur on your Mac.

In this guide, you’ll learn the steps to create a macOS Catalina bootable USB installation on Windows 10, which you can use to reinstall or upgrade the Apple OS.

Requirements

Before proceeding, you’ll need the following:

• Broken Mac computer running macOS (version 10.12, 11, or later).
• A trial copy of the TransMac software.
• One high-quality USB flash drive with 16GB of storage.
• Copy of macOS (DMG file).

Create macOS bootable USB installation media

To create a bootable USB drive with macOS, use these steps:

1. Download and install TransMac on the Windows 10 device.

   Quick note: This is a paid software, but it gives you a 15-day trial, which is more than enough time. (If this works for you and you want to support the developer, you can purchase the full version.)

2. Connect the USB flash drive. (If you have any data on the flash drive, remember to make a backup, as everything on it will be erased.)

3. Right-click the TransMac app and select the Run as administrator option.

4. Click the Run button. (If you’re using the trial version, wait 15 seconds.)

5. Right-click the USB flash drive, select the Format Disk for Mac option from the left navigation pane.

   Quick note: You want to do this before creating the bootable media because there is a good chance that the drive was formatted using a Windows device. If this is the case, the chances are that it’s using an MBR partition, and the USB drive needs a GPT partition to work on a Mac.

6. Click the Yes button to format the drive on the warning message.

7. Confirm a name for the drive. For example, “macOS bootable USB.”

8. Click the OK button.

9. Click the Yes button.

10. Click the OK button.

11. Right-click the USB flash drive and select the Restore with Disk Image option from the left navigation pane.

12. Click the Yes button to confirm the erase of the USB flash drive data.

13. Click the browse button on the right.

14. Select the .dmg file with the macOS installation files.

15. Click the Open button.

16. Click the OK button.

17. Click the Yes button.

Once you complete the steps, you can now insert the USB flash drive on your Mac computer to install, reinstall, or upgrade the operating system to the latest macOS version, which can be Sierra, Catalina, Big Sur, or higher.

Create a GPT partition on USB flash drive

If the USB flash drive is not working with TransMac, it could still be a partition problem. In this case, you may need to redo the entire process again. However, this time you should use the following steps to use the Diskpart command-line utility on Windows 10 to create the appropriate GPT partition, and then follow the above instructions.

How To Create A Bootable Usb For Macos Catalina

To create a GPT partition on a removable drive, use these steps:

How To Create A Usb Installer For Macos Catalina

1. Open Start.

2. Search for Command Prompt, right-click the top result, and select the Run as an administrator option.

3. Type the diskpart command and press Enter.

4. Enter the list disk command to view all drives connected to your computer and press Enter.

5. Type the select disk command followed the number assigned for the USB flash drive (for example, select disk 4), and press Enter.

6. Enter the clean command and press Enter.

7. Type the convert GPT command and press Enter.

8. Enter the create partition primary command and press Enter to complete the process.

How To Create A Catalina Install Usb

Once you formatted the USB flash drive with a GPT partition, you can use the instructions mentioned above to use TransMac to create a bootable media, but this time skip steps No. 5 through 10 and continue on step 11.

Create Macos Catalina Install Usb On Windows 10

After the process completes, which can take up to an hour, connect the USB flash drive and power on your Mac holding down the Option key, select the USB drive to begin installing macOS.

How To Make A Bootable Usb For Macos Catalina

Catalina Patcher Firmware Update Required Download

If you have problems creating the bootable media, you can get a USB flash drive that comes with macOS Sierra, El Capitan, Catalina, etc., on it with the link mentioned below. (I haven’t tried it personally, but it’s worth the try if nothing works.)

Catalina Patcher Firmware Update Required Version