Jumpy Block Mac OS
Jumpy Block Mac OS
- Posted on July 16, 2015 July 15, 2015 Author krypted Categories Mac OS X, Mac OS X Server, Mac Security, Mass Deployment Tags applicationlayerfirewall, configure, defaults, firewall, global state, MAC, mac firewall, socketfilterfw, start, stop Post navigation.
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- Jump Like Your Life Depends On It - Because It Does.
- Here's how to block an email sender on a Mac on whichever operating system your computer is running. Check out the products mentioned in this article: MacBook Pro (From $1,299.99 at Best Buy).
Greetings, keriah!
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This article explains how you can block or allow pop-up window ads on your Mac. Generally, pop-ups are forms of advertising. Roblox dmg ipad. The good news is that you can easily configure your Safari browser to allow or block pop-up windows. How to block pop-ups in Safari. Pop-ups are annoying. They are unwanted. Sometimes they may slow down your computer.
Welcome to the Apple Support Communities. From what I'm understanding in your description, it sounds like any time you open an app that displays more than a screen's worth of content and you stop scrolling, your screen is 'jumping' down to the next page/section/line all by itself without any action from you. I can definitely understand why you contacted us about this! I would find it hard to read what's on my screen if the content 'jumped' every time I took my hand off my mouse. I would be happy to help in whatever way I can.
First, you didn't mention what version of OS X you have. Keeping the software on your MacBook up-to-date is always recommended, and would ensure that you have the latest versions of Safari, Finder, Mail, and all the other apps included in Mac OS X. The following documents will help you back up your MacBook and update your operating system:
You mention using a mouse, and that this screen behavior doesn't happen when you use the built-in trackpad. Is it an Apple mouse (either wireless Magic Mouse or the USB model)? If it's a third-party mouse (not made by Apple), then you'll need to check with the manufacturer to see if they might have updated drivers for it, or if there might be some settings that are causing this behavior. Another useful troubleshooting step would be to try this in a 'test' user account to see if it happens there, too. That would tell us if the issue is system-wide, or just in your account. Use these instructions to create a 'test' user:
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Starting your MacBook in safe mode can help determine if startup or login items are causing your scrolling issue. It also deletes font caches, Kernel cache and other system cache files. The article's title says it's for El Capitan (OS X version 10.11), but the instructions are the same for other versions of OS X:
Have a great week!
Aug 8, 2016 12:08 PM
There are not many things I miss from Mac OS 9. But there’s one that was really useful: the ability to test a hard drive surface. OS 9 disk formatter (I don’t even recall it’s name) had a “Test Disk” option that would perform a surface scan of the selected hard drive. That was awsome to test for bad blocks on the drives.
Unfortunately, that’s impossible to do with Mac OS X, at least with it’s built-in software. There are some commerical applications to do that (like TechTool Pro), but I get a little pissed off when I have to spend a lot of money buying a software that does a zillion things when all I want is surface scans, and specially when I could do it with the “old” OS and not with the new powerful UNIX-based one.
Well, Linux has the badblocks command that will do just that: test the disk surface for bad blocks. It’s a simple UNIX command, so I thought there must be a port of that to OS X (and, of course, I could try to compile it in OS X as last resource). After some googling, I found out badblocks is part of the ext2fs tools. And, fortunately, Brian Bergstrand has already done the port to OS X, including a nice installer.
The installer installs all the ext2fs stuff, including an extension that will allow you to access ext2fs volumes on OS X. As always, this is a somewhat risky operation. Call of duty modern warfare 2019 logo. Personally, I avoid as many extensions as I can, because they run too close to the kernel for me to feel confortable. So, if possible, install it on a secondary OS (like an utility/recover system on an exteral hard drive, or so).
The badblocks command will be installed in /usr/local/sbin/badblocks, and it will probably not be on your PATH, so you have to type the entire path when using, or edit your PATH environment variable.
Usage is simple. First, run the “mount” command, so that you know the device names for the drives you want to test. You can obtain something like this:
arroz% mount
/dev/disk0s3 on / (local, journaled)
devfs on /dev (local)
fdesc on /dev (union)
on /.vol
automount -nsl [142] on /Network (automounted)
automount -fstab [168] on /automount/Servers (automounted)
automount -static [168] on /automount/static (automounted)
The internal hard drive is /dev/disk0 (note that /dev/disk0 is the entire drive, /dev/disk0s3 is a single partition). Imagining you want to test the internal hard drive you would type the command (as root):
badblocks -v /dev/disk0
This would start a read-only test on the entire volume. The -v is the typical verbose setting, so you may follow what’s happening. This will take a long time, depending on the hard drive you use. For a 160 GB hard drive, it took between 2 and 3 hours in a G5 Dual 2 Ghz.
I mention this because time is an important factor when testing hard drives! You should run badblocks on a known-to-be-in-good-condition hard drive, so that you can get the feeling of how fast (or slow) badblocks is. Later, if you test a possibly failing hard drive, and badblocks progresses notably slower, it will probably mean that the hard drive is in bad condition (even if it doesn’t have badblocks).
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After running the command, you may get two results: your disk has, or hasn’t badblocks! 🙂 You will see many outputs of a successful surface scan, so I leave here an example of a not-so-successful one:
/usr/local/sbin arroz$ sudo ./badblocks -v /dev/disk0
Password:
Checking blocks 0 to 156290904
Checking for bad blocks (read-only test): 120761344/156290904
120762872/156290904
120762874/156290904
done
Pass completed, 3 bad blocks found.
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This is the result of a test on a 160 GB hard drive with 3 bad blocks.
After getting something like this, you may try to run badblocks again, in write mode. Note that this will destroy all the information you have on the hard drive! badblocks won’t copy the information to memory, and than back to disk. It simple destroys it. The point of running a write-enabled badblocks check is forcing the hard drive to remap the damaged sectors. Hard drives have a reserved space to use when bad blocks are found. The bad blocks are remapped to that reserved space, until it fills. And this will only happen on a write. So, run badblocks in write mode, and then again in read-only mode. If badblocks finds no bad blocks, your hard drive is fine (for now). If badblocks still finds bad blocks, it means that there are so many damaged blocks on the disk surface that the reserved area is full. Forget it, and throw the disk away. It’s useless.Jumpy Block Mac OS