Dec 08, 2015 Question: Q: El Capitan can not see an external drive I have an iMac (27-inch, Late 2013) using El Capitan, While it will see two of my externals, it no longer sees my Seagate Backup Plus 5TB Desktop External HardDrive which has 4.3tb available. Naming change for macos.
FYI......2 UPDATES since I posted this question:
1. Drobo has UPDATED their FIRMWARE to now allow for 64 TB 'Beyond RAID' Drobos. So, their original 16 TB limit has now been superseded by their new Limit of 64 TB. Also, note that, when using a Drobo, Apple's Mac OS does not properly show the 'Drive Space' and the 'Free Space,' if the Drobo exceeds 16 TB in size; but, the Drobo DashBoard Application does show the Correct Numbers. For example, my Drobo 5D contains 5, 8 TB Drives, for a Total Beyond RAID Size of 40 TB (in theory, since most of us should know, by now, that the ACTUAL SIZE IS SLIGHTLY LESS THAN THE THEORETICAL SIZE). The ACTUAL SIZE AVAILABLE FOR USE IS ONLY 28.9 TB. Thus, 40 - 28.9 = 11.1 TB gets used-up for the Beyond RAID PROTECTION and the difference between ACTUAL SPACE versus THEORETICAL SPACE. THIS IS NORMAL because any RAID 5 Device always uses about 1 Hard Drive Size for its Protection. So, knowing this fact, the DeskTop Icon should be showing the Drive Space as 28.9 TB and the Free Space as whatever is not yet used. However, instead, the Mac OS shows the Drive Space as 70.37 TB and the Free Space as 68.37 TB, which are both incorrect. Although I would love it if the Mac OS was magically increasing my Hard Drive Space, in fact, both numbers are false. Drobo knows this and Apple does not, from my discussions with both. So, between the two companies, I hope this problem can be fixed.
2. After many hours on the telephone with Apple Support, going through no less than 6 people, including 2 Senior Advisors, NONE OF THEM COULD ANSWER MY QUESTION ABOUT WHAT IS THE MAXIMUM ALLOWD HARD DRIVE OR RAID SPACE ALLOWED BY Yosemite and El Capitan. To me, THIS IMPORTANT TECHNICAL FACT SHOULD SIMPLY BE LISTED IN THE OS SPECIFICATION, that is easy and quick to read on the Support Site. But, Apple being the new bureaucracy that they are, I do not see this happening, anytime soon. So, just be aware that, for now, THERE IS NO LIMIT ON SIZE, as one Apple Advisor said; but, could not confirm in writing; and, THERE IS AN INCORRECT DISPLAY OF SIZE AND FREE SPACE, if your Drive exceeds an unknown 16+ TB in size. Note that I do have 3 other RAIDs that are correctly showing-up as 9 TB, 12 TB and 18 TB in size; but, I do not know at which point SIZE DOES MATTER so that the OS displays it incorrectly, except for my 40 TB Drobo. So, bottom line, somewhere in between 18 TB and 40 TB is where it goes false, in its display of sizes.
Apr 21, 2016 2:56 PM
Disk utility in El Capitan can be used to format a hard drive in El Capitan. EL Capitan has provided Disk utility with an opportunity to restyle. El Capitan is selling a name for the latest update for your Mac OS X system software. The OS X EL Capitan 10.11.3 update boosts the compatibility, stability and security of your MAC. Remember that formatting will erase all of your drive’s data including your apps, files and operating system too.
How To Format Hard Drive in El Capitan Using Disk Utility?
- Connect your device to MAC and boot El Capitan in recovery mode by starting up your MAC and pressing command+R.
- A window can be seen specifying OS X Utilities like Reinstall OS X, Disk Utility etc. Open Disk Utility Options
- Select the storage Device on the left pane you want to format from Disk Utility
- Click on erase button on the top menu (If the device you want to format is in use currently then erase button will be fade) If the ‘erase’ button is faded out, return to step 1 recovery mode.
- After you click ‘erase’, a dialog box shows up asking you to enter a name for the storage device.
- Next click the format pop-up menu and select any one from the listed formats (By default OS X Extended (Journaled) is selected)
Now all your data is erased. Reformat your disk device. As soon as you are done with erasing the data on the desktop, you will find the mounted drive. This device will be ready to install El Capitan.
Aug 10, 2018 Installing R. Go to this website. If your mac is OS X 10.11 and higher (this should be the case for most of you), click the R-3.5.1.pkg link. If your mac is OS X 10.9 or 10.10, click the R-3.3.3.pkg link. After clicking on the link, the file (package installer) will be downloaded onto your computer. R 3.5.1 for macos 10.9. R 3.3.3 binary for Mac OS X 10.9 (Mavericks) and higher, signed package. Contains R 3.3.3 framework, R.app GUI 1.69 in 64-bit for Intel Macs, Tcl/Tk 8.6.0 X11 libraries and Texinfo 5.2. The latter two components are optional and can be ommitted when choosing 'custom install'.
