Your Mac’s Recovery Mode is a treasure trove of useful tools, and it’s the easiest way to wipe your computer and start from scratch. Shut down your Mac, turn it on while holding down Command+R. Your Mac will boot into the recovery partition. Make sure your operating system is compatible with Scratch Link The minimum operating system versions are listed at the top of this page. See instructions for checking your version of Windows or Mac OS. Make sure your computer is paired with your EV3. MacBook Pro 13' Retina Display Late 2013. Model A1502 / 2.4, 2.6, or 2.8 GHz dual-core Intel processor / Released October 2013.

1. Scratch Mac Os
2. Scratchy Mac Os Catalina
3. Scratchy Mac Os X
4. Scratchy Mac Os Update

Every day is a great time to listen to your favorite tunes and some truly sick beats on your MacBook Pro. Out of the blue, however, you may find that your trusty laptop sounds unwell. Songs and videos coming from various apps and browsers, for instance, might sound terrible.

Audio issues aren’t at all a rare occurrence for MacBook Pro users. Users online have documented their issues with the MacBook Pro speaker, where they encounter a sizzling noise, speakers crackling, or a popping sound straight from the machine.

Here’s a quick guide to navigate these strange sounds coming from the MacBook Pro speaker and recover the good listening experience you’ve had before.

Weird Noise on MacBook Pro: Troubleshooting the Problem

That weird noise on MacBook Pro can be caused by many different things, such as damaged or blown speakers, audio settings gone wrong, or a temporary issue that you can resolved when you reset the PRAM and SMC. After Apple released the MacBook Pro with a new feature known as Touch Bar back in 2017, forum users shortly came out to complain about a popping sound – their common denominator was owning the MacBook Pro with Touch Bar, albeit bought at different times and with various manufacturing dates.

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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It’s important to properly troubleshoot the sound problem to identify whether it’s caused by hardware or software, or if it’s merely a system update that can tackle the sizzling or popping sound. First, determine if it’s the speakers or the audio settings at fault. Plug in your headphones and start listening to anything with sound. If the sound comes across as clear on the headphones, then that means the problem is related to software. Blown speakers, for instance, may crackle at high volumes.

If your audio woes happen only while you play specific songs, videos, or other files, then it’s likely that the files are corrupted or suffer from low quality. If the problem persists, too, even if you listen from a CD or DVD and not directly from your hard drive, then you can proceed to troubleshoot the sound settings.

Before you try one of the fixes we provide below, make sure to always keep your MacBook Pro in tiptop shape by diagnosis your system regularly, cleaning out junk, and eliminating space hogs using a reliable Mac repair tool.

How to Solve Speakers Crackling and Other Audio Issues on MacBook Pro

Scratchy Mac Os Catalina

Here are some methods you can try to solve the sound problem on your machine:

Checking Audio Preferences

Expect audio issues when the speakers on your laptop are set incorrectly in the preferences. Follow these steps:

1. Unplug all external devices from the USB, FireWire, as well as 3.5 mm audio ports.
2. Open System Preferences, and then click Sound > Output tab.
3. Choose Internal Speakers as the default option. If there are no other options, choose Internal Speakers to ensure that the option is selected anyway.
4. Slide the Balance slider left or right while audio is playing in order to test if just one speaker’s not working right. If the problem happens while the slider’s all the way in either direction, then it means one speaker is damaged and needs to be repaired.

Reset your PRAM and SMC

Scratchy Mac Os X

Reset your Parameter Random Access Memory (PRAM) and System Management Controllers (SMC), which you can do by booting your computer while you hold down the Command, Option, P, and R keys simultaneously until you hear two chimes. Here are specific steps:

1. Shut down your laptop.
2. Turn it on again using the power button. Immediately press and hold the Command + Option + P + R keys. Wait until you hear the startup chime twice.
3. Reset the SMC by shutting down your laptop, making sure that the power cable remains plugged in.
4. Simultaneously press and hold Shift + Control + Option on the left side and the power button for five seconds.
5. Release the keys and turn off your computer.

Installing macOS Updates

Some Mac OS X users reported hearing their speakers crackling after the 10.4.10 update, even though their speakers weren’t at all broken. To address this, update your OS to its latest version in order to patch any audio issues. Your audio woes might not be the result of your last update, but getting the most recent update just might be key to solving them.

Final Notes

Audio hiccups on your MacBook Pro can be totally annoying, but can signal a more serious problem as well. Electronics that produce a sizzling sound when electrically connected, for one, should be a red flag. It’s important to unplug it if it persists, remove the battery, and contact Apple support for assistance.

Otherwise, if you’re able to troubleshoot the problem more clearly, then you can try one of the three solutions we provided above and see if it successfully fixes that weird noise on your MacBook Pro.

Do you have the same problem? Tell us about your experience in the comments!

It would be nice and easy to saythat the latest operating systems for each EPS/ASR instruments wasthe best to use, absolutely. This is the case with the OriginalEPS - there is no advantage of using an older operating system,since the last (2.49) has everything and fixes everything.

This is not necessarily the casewith the 16-Plus or the ASR-10/88. Although the last operatingsystem for each may be the most reliable to use, some of theolder operating systems do have certain benefits.

Below is a chart of most of thereleased and unreleased operating systems, a description ofpossible usages, and a download. Recommended OS's for regular useare in bold.

Important Note: These downloads that do not work on Windows XP. Please see Article 32, Floppy Image Boot Disks for all-in-one Win98 boot floppy images, that allow you to write OS floppies on any Windows operatingsystem.

Scratchy Mac Os Update

Downloading Information
All the downloads are a Disk Images that can be usedwith most/any popular Ensoniq-disk-writing program. Only the ASROperating Systems are available for Mac download, since the Maccannot write images with the OS on them to floppy disk.

• PC users: Simply run the .exe file, and it will install the file and the EDE109 program, which will automatically start and gives you the proper instructions to write the file to a Ensoniq floppy. Important Note: These downloads that write OS's to Ensoniq floppies do not work on Windows XP. Please download a Floppy Image Boot Disk from Article 32, Floppy Image Boot Disks.
• Mac users: UnStuff the Disk Image, and use EPSm to write the image to Ensoniq floppy. (If you do not have EPSm, you will need to purchase it from the author - click here for more details.)

Checking your OS versionand the ROM BIOS version
On all Ensoniq keyboards, press COMMAND and then double-clickon the ENV1 button. Scroll up 1 to the SOFTWARE INFORMATION page,and press ENTER-YES. You will see the OS version first (RAM),then press ENTER-YES again. You will see the ROM BIOS (ROM)version. Press ENTER-YES again, and you will see the KEYBOARDversion (not of any use).

MiscellaneousInformation

• EPS OS 2.4 truly introduced a 'virus' into certain Ensoniq diskettes - the bug in the COPY FLOPPY function created the inability to edit certain files on the disk, although they could load and play their sounds. So if you have sounds that perhaps went through this stage - check them out.
• Notice that all operating systems for the EPS's were 167 blocks, while the ASR OS's would and could grow in size. This is likely because of a redesign of placement of the operating system and the management of that within the memory system
• Ensoniq decided against the LOADFILE commands within the 16-Plus because of the glitches of audio that would occur when an instrument would load
• Ensoniq apparently released 2.49 in hopes that OS 2.50 would include the backup/restore feature that was in development. This wound up on the 16-Plus, but for some reason Ensoniq never released/adapted the backup/restore feature for the Original EPS. Also, interestingly, the majority of ASCii text strings contained in the 16-Plus OS are the ones involved with the backup/restore feature. This suggests that the feature was a later inclusion in the 16-Plus OS, as most of the text string information is either on the main sound chip (OTIS) or the ROM BIOS chip.
• There have been rumors that there are slightly different versions of the 16-Plus's ROM BIOS; e.g. 1.0a, 1.0f. We do not know of any differences between systems; however, we do know that some Waveboy effects have some glitches within early-made 16-Pluses (particularly in Europe). Perhaps these two things are related
• Ensoniq did recommend at the time of the ASR 2.01 release that using 1.61 would be a good idea to those who did not desire the audio-track features. However, as mentioned above, Ensoniq has not mentioned anything about the later OS's being more efficient/less buggy than 1.61
• The only operating systems that require a certain ROM BIOS in the machine are the ASR OS's; however, remember that any OS that used the earlier BIOS 1.0 is worthy of being discarded and upgraded to at least 1.61. So if you have ASR ROM BIOS 1.0, get 1.5 from an Ensoniq Service Center!
• For a list of bugs that still remain in the latest OS's, click here.