26

You don’t need to remove the HDD and no need for second Mac. Boot the MacBook Pro from the USB stick (that you made with OS X El Capitan 10.11) Using Disk Utilities in the Tools menu, you can reformat the hard drive as part of the installation process. To boot using the USB, restart your MacBook and press and hold the Option key and Select the USB drive ...


11

It's probably the 'Spotlight' indexing that is busy indexing the drive 's content.


10

macOS's mv is based on the BSD source code. You can find the source code to the mv command online. Using https://github.com/freebsd/freebsd/blob/master/bin/mv/mv.c as a reference, you can see that they do indeed first try to rename the file and then if it is crossing filesystems, it does a cp followed by a rm. /* * If rename fails because we're ...


7

There is no need for the USB stick, you can do a clean install from the recovery partition if it's available. Depending on the origin of the USB stick, it might even be a bad idea to use it at all. Restart into recovery mode, delete the current installation and reinstall the operating system for the same result: https://support.apple.com/en-us/HT204904


6

Yes, you're right in thinking that moving a single file on the same file system is really just implemented as a rename operating that the file system structure is changed to update the new name/location of the file, but the file contents are not read/written to the drive again. When the move happens across two different file systems (drives or partitions), ...


6

Disk Utility will only offer APFS if Partition Map is "GUID Partition Map". If the Partition Map is "Master Boot Record" APFS is not an option (and neither is encrypted HFS).


5

Can I re-format OS X drive without removing it from my MacBook Pro? Yes. You need not remove the hard drive from machine A or connect machine A to machine B to do this. You simply need a bootable (USB) installer for OS X El Capitan 10.11. Once you have the bootable installer handy, simply leave the hard disk into machine A, plug-in the bootable USB ...


4

Launch System Preferences Select Spotlight Select the Privacy tab Add the tab of the volume that should not be searched (NOT the one you've booted from) Wait a minute - ensure the change gets written to disk Reboot


4

The reason you can't access the Startup Security Utility is because it doesn't exist for your model of MacBook Pro. More specifically, Startup Security Utility is only available on Mac computers that have the Apple T2 Security Chip. So far the only Macs that have the T2 Security Chip are: iMac Pro Mac mini models introduced in 2018 MacBook Air models ...


4

Blackmagic Disk Speed Test If you're interested in read and write speeds there is an app called Black Blackmagic Disk Speed Test available on the App Store. This doesn't have a database to compare with others but can give you actual speeds for your internal and external drive.


3

diskutil partitionDisk command does exactly what you described happening. Partitions a disk, removing all volumes. All volumes on the disk you ran the command on are destroyed. So you partitioned disk4 and renamed it newdisk using GPT HFS+. I'm not sure where you got the command information from but the command you entered did exactly what it was ...


3

It feels like this is happening a bit too often to blame on "Well sometimes ya just get a bad one!", and I'm wondering if I am overlooking other factors? Yes! Based on what you're doing, your using your drives not as a typical home user but more of a "pro" and you should be getting the hardware to match. Most consumer (especially the entry level ...


3

Windows prompted me to specify which type of file system it was... Windows disk management console doesn't ask you to tell it what type of file system it, it asks you what file system you want to write to it. Is there any way I can get this drive working on a Mac again? Don't attempt to write anything to the disk Duplicate the drive to an image on her ...


3

If the internal hard drive is empty, then you just need to select it in Time Machine settings as the target. There should be no other setup necessary. If it is not empty, and you cannot empty it, you should partition it first. However, if it is the wrong format, Time Machine will need to wipe it. It needs to be MacOS Extended (Journaled) for Time Machine to ...


2

By accident I found that, by attempting to reformat my Seagate drive as FAT32 (which failed), I was then able to reformat to Mac OS (J Ex) with the partition options available… This then said it was able to work as a startup disk – not tried booting from the CCC backup yet, fingers crossed!


2

Follow these steps to format the USB drive to be able to copy files to it from a Mac: Open Disk Utility app. The quickest way is search on Spotlight and click the result under TOP HITS. Alternatively, you can access it via Finder → Applications → Utilities → Disk Utility. In the sidebar under External section, highlight your flash drive. Note: right below ...


2

I learned today that you can use a sudo touch /.metadata_never_index_unless_rootfs in the root directory of each drive to separate Indexes from OS X Boot-Drives. It is a special version of .metadata-never-index, because it will (re)index the drive when you boot from it, but not when you don't.


2

Windows cannot read HFS+. You need to either get third party drivers (like Paragon HFS+) for it or use a Mac. If you did format your disk, your data is gone. There's no such thing as telling Windows to expect a filesystem; you probably formatted it. If you only assigned a letter to it, the data should still be intact.


2

Time Machine is optimized to create and maintain a history of file-level backups of all files/folders on your system. What you rather need is a disk/image level backup which just dumps the whole drive onto an external drive. You can afterwards either copy the whole image back again or, probably more useful, get specific folders back. The two applications ...


2

I searched around and found out that there's an option in Energy Saver: Put hard disks to sleep when possible and it's checked on my Mac. You can see the option in the screen shot below:


2

Windows 10 installed on a Mac does not need a third party driver in order to read an external NTFS hard drive (question was based on wrong perception). Thank you to David Anderson


2

I started killing processes with "Notification" in their name, and when I hit the one called "NotificationCenter" the smoke finally cleared: killall NotificationCenter


2

It is not possible to stop the decryption of the drive while also using the drive. You can unmount and possibly unplug the external drive, and the decryption will obviously stop. However, as soon as you plug the drive in again and mount the file system, the decryption process will continue. You cannot ask the system to stop that. Your options are either ...


2

AJA System Test is another commonly used tool to benchmark disk performance for the Mac. It offers graphs and a text report of performance instead of just a dial indicating transfer speed like Black Magic. If you want to test random I/O, which neither AJA or Black Magic do, you can use the tool fio like you can on Linux. You can expect the IOPS to be much ...


2

You are almost there. Check again in Disk Utility app. Format You will find APFS as an option in the Format pop-up menu. Scheme You make the same choice of GUID Partition in the other pop-up menu Scheme.


2

Moving by cut & paste is not really that different from copying and deleting, no. The explanation for the data loss is buffering. When you ask Finder to cut & paste (or copy and delete - doesn't matter) - all that Finder does it ask the operating system to copy data to the external drive and delete the file from the internal drive. The operating ...


2

"Apple doesn’t recommend storing iMovie libraries on external storage devices like SD cards and USB flash drives, or drives shared on a network." 'cause the quality of external flash cards are poor. I have like eight flash drives bought in the last eight years and two of them have failed. External cards use a double layer of circuits where as internal ...


2

Eject the device properly to avoid any chance of errors. I have seen several devices trashed by just disconnecting... Reformatting made them useable again.


2

No, it doesn't mean that files, etc. are inaccessible to administrators as such. When you have booted macOS from the external drive, and haven't enrolled, you're running the default software supplied by Apple alongside your own custom modifications. However when you're booting from the built-in drive, you're running on an enrolled installation that ...


2

The MacBook Pro internal SuperDrive uses a standard SATA connector. You should be able to use any SATA > USB cable to mount the SuperDrive externally. It was a common modification to replace a MacBook's SuperDrive with a second Hard Drive. Those people then had the option to use the SuperDrive externally, as in the video below: Connect your Macbook ...


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