My Pro 1,1 with 32GB RAM, an SSD, and an ATI 5770 runs El Cap absolutely great. The only big issue is that it uses quite a lot of power compared to a modern machine. No, it's not as fast as a new mac, but it's totally capable of being a daily driver for most uses. Dec 22, 2019 Attach the Mac Pro boot drive to a Mac. Download El Capitan from the App Store on this Mac. Run Disk Utility and wipe the destination drive, making sure to used GUID partition table. Run the El Capitan installer and make sure to select the Mac Pro drive. Prepare the New Drive. Boot from the new El Capitan drive in restore mode with cmd+R; Run terminal app; type csrutil disable; reboot (this reboots the Mac).

I bought my Mac Pro 2006 in 2016. 5 years after it’s last Operating System upgrade – 10.7 Lion. These shortcomings meant that the machine was cheap. At the time, I paid ~£150 for a Mid Range 4 Core (2x2cores) 2.66GHz Mac Pro with 8GB of Apple Certified Memory and a 250GB Hard Drive. It actually ended up with 2 hard drives – my machine was damaged in shipping and they told me to keep the drive from it and put it in the replacement machine overnighted to me!

Over the first year, I had a lot of fun upgrading and playing with it. It had Lion. I put Snow Leopard on it, upgraded Lion to Mavericks, upgraded the paltry Nvidia 7300 with the Apple ATI 5770 and installed an SSD. By this point, I was happily chugging along with Yosemite.

In October I upgraded the two dual core 2.66 GHz processors with two quad core 2.66 GHz processors, giving me an 8 Core, for £5 + an hour of my time! My 32 bit Geekbench went from 5601 to 8945. Quite a leap! I use this machine for BBC Iplayer Downloading and encoding DVD rips for my Plex library, so the CPU will really help.

By early 2018, Yosemite is coming up to 4 years old. It hasn’t suddenly stopped working, and everything it used to do, it can still do. But I knew the Mac Pro 1,1 was capable of running El Capitan, and because of the security updates, I felt it was time to make this upgrade. I don’t need anything more than this 1,1. At least right now.

Just a quick notice. There are applications that can make this easier for you. I tried them, and for some reason they didn’t work for me. Perhaps they will for you. This is what I did, and what worked for me, after hours of trial and error. YMMV.

What you need

• El Capitan Install App. You can get it from the Mac App Store on a supported Mac, or through other means.
• A supported Mac. This should be capable of running El Capitan natively.
• 8GB RAM minimum (in my testing) and Decent GPU in your Mac Pro
• Download this modified boot.efi file. Choose either the Black or Grey (Old style) boot screen version.

What to do

• Install El Capitan. You need to install it to your Mac Pro’s boot drive on the supported Mac. You could take the drive out and connect it somehow, or just use Target Disk Mode like I did. Once fully installed, step 2.
• Boot the supported Mac on its internal hard drive, but keep the Mac Pro drive connected. Open Terminal and a Finder window and navigate to MacProDrive/System/Library/CoreServices and find the file called boot.efi
• Type the following command in Terminal

Then drag the boot.efi file onto the Terminal window. It should paste in the address of that file. Then hit the enter key. It may ask for your password. Type this in and press enter again.

• With the file unlocked, you can now replace it with the modified boot.efi file you downloaded earlier.
• You’ll need to re-lock it, so back to Terminal and type

and drag the boot.efi file you just put in there onto Terminal. Hit enter.

• Browse to usr/standalone/i386 and replace the boot.efi file there. This one isn’t locked and doesn’t need locking. Just a straight swap. This folder is hidden by default, so use Command-Shift-G and type /usr to find it.
• The Recovery partition has it’s own boot.efi. If you patch it, it means you can use your recovery partition natively. By default, the Recovery Partition does not mount on the desktop. You will need to hop back onto terminal, to enable Debug menu in Disk Utility. Type the following;

• You should now see the Debug menu in Disk Utility. Open it and enable hidden partitions.
• Under your main MacProDrive, find Recovery HD. Click Mount. It should show on the Desktop.
• In the hard drive, you’ll find another boot.efi. This one also has to be unlocked. You should know how to do that by now. Remember after replacing it, you’ll need to re-lock it.

The loose ends

• You should now be able to boot to the Desktop of El Capitan on your Mac Pro. You may wish to install Boot64.v3.mpkg.zip. This app will check to see if your boot.efi files are overwritten by an Apple software update, and will restore the patched versions if an OS update removes them. You will probably have the latest updates installed if you had a fairly new copy of the Installer.
• DO NOT install Security Update 2018-001. This will put your Mac Pro in a boot loop, as it changes the Kernel. This security update addresses the Meltdown security issue. However, the processors in the Mac Pro 1,1 are not affected by this, and so it is safe to skip it anyway.

Need more help? Check out this forum dedicated to this subject.

Thank you for coming back to me. My Mac is 10.8.6 from memory. I had gone into Debenhams website and got message saying unsafe and I may need to upgrade browser, giving me link to El Capitan. Tried to install, told me it couldn’t and I’ve now got XS 0 installer on screen which won’t quit despite me trying as per above.

El Capitan is Apple’s marketing name for OS X version 10.11, the latest update to your Mac’s system software. If your Mac is running Yosemite (10.10), Mavericks (10.9), or Mountain Lion (10.8. Search for ( 'How to Install Windows 10 onto Mac OSX El Capitan using Bootcamp ' ). Macbook Pro 13 Upgrade Parts list: Apple MacBook Pro MD101LL/A 13.3-Inch Laptop Apple 13-inch MacBook Pro (Intel Dual Core i5 2.5GHz, 4GB RAM, 500GB HDD, HD Graphics 4000, OS X Lion) Samsung Evo 850 500gb.

This tip replaces version 2126 originally released on the Discussions Feedback forum.

Find the serial number on:

Plug your serial number in at this link:

Do not use third party links as they may not be secure.

Do not post the serial number on this board, as that is your key to any support you may have left.

Use this tip also to help figure out which portion of the Support Community to post in, as this tip explains:

When you have no serial number, use one of these third party sites to find your model, production year, time in year

(early, middle, late, summer, fall, winter, spring):

Note:

PowerMac, PowerPC, eMac, iMac PPC, iBook (Apple recycled the name iBook for its eBook application on new Macs and iOS devices), Powerbook, Classic all refer to Macs that are older than the present series

of Macs. Posting in those forums about a current Mac, shows you have not researched your Mac sufficiently to get a succinct answer to your query. Apple menu -> About This Mac will tell you the Mac OS version or System version you are running. The X in the version is important, and so is the preceding 10 in the version if it exists.

Questions saying X.1 could refer to Mac OS X 10.13.1, 10.1. Don't truncate the version you see.

There are no iOS forums specific to the operating system found on iPads, iPod Touch, AppleTV, Apple Watch, and iPhones. Figure out the type of portable device you are running to ask a question about that device specifically.

Apple has these identifying articles as well:

http://support.apple.com/kb/ht3255 - MacBook Air

http://support.apple.com/kb/ht1635 - MacBook

http://support.apple.com/kb/ht4132 - MacBook Pro

http://support.apple.com/kb/ht3476 - Mac Mini

http://support.apple.com/kb/HT6069 - Mac Pro

http://support.apple.com/kb/ht1758 - iMac
http://support.apple.com/kb/sp96 and http://support.apple.com/kb/sp37 - PowerMac G5

http://support.apple.com/kb/TA25585 and http://support.apple.com/kb/ht3082 - PowerMac G4

http://support.apple.com/kb/TA22033 - PowerMac G3

http://support.apple.com/kb/ht3065 - Powerbook G4

http://support.apple.com/kb/ht2395 - eMac

http://support.apple.com/kb/ht2287 - Powerbook G3

http://support.apple.com/kb/ht1772 - iBook

Macs generally will not run an older Mac OS X operating system than shipped with them.

The one exception is virtualizing 10.6 Server on 10.7 or later, which is described later.

Also important to note is that the Apple App Store only has 10.7, 10.8, and 10.12, except for those who purchased in between systems, and have a Mac that shipped with in between systems. For all others if you need an in between system, and your Mac is older, contact the App Store tech support.

A quick upgrade guide has been posted on

These dates are important for recognizing what Mac OS X will run on Macs. Macs released on or after (including their model #s or name

where known):

September 30, 2018 will only run 10.14 or later

• MacBook Air 8,x

• Mac Mini 8,x

September 25, 2017 will only run 10.13 or later.

• iMac Pro 1,1
• MacBook Pro 15,x (2018 model)

June 5, 2017 Mac models (all 2017 Models except iMac Pro) will only run 10.12.5 or later

• MacBook Pro 14,x

• MacBook Air 7,2

• MacBook 10,1

• iMac 18,x

September 20, 2016 will only run 10.12 or later.

• MacBook Pro with touchbar (instead of physical F keys)
• MacBook Pro 13,x
• iMac 18,x
• MacBook Air 7,2 see this article on which ones could only run 10.12 or later.

September 30, 2015 will only run 10.11 or later. These Macs are the first Macs that can be upgraded directly to

Mac OS 10.14 without installing any other software.

• iMac 16,x and 17,x
• Macbook 9,x (these Macbooks came with the USB-C, instead of the USB 2 or USB 3 connector. USB 3 and 2 look identical on the outside, use System Profiler to determine which you have)

October 16, 2014 will only run 10.10 or later (10.10 is only available for Macs that shipped with it).

• MacBook Air 7,1 and 7,2 (some models could only run 10.12 or later).
• Mac Mini 7,x
• iMac MF885LL/A came with 10.10.2. All other 15,x came with 10.10.0
• MacBook 8,x - the oldest that can run Mac OS 10.14 with this model name after installing 10.11 or later.
• MacBook Pro 11,4 and 11,5

October 22, 2013 will only run 10.9 or later (10.9 is only available for Macs that shipped with it).

• Macbook Pro 11,1 through 11,3
• Mac Pro 6,x
• MacBook Air Early 2014
• Mac Mini 6,x
• iMac 14,4

June 25, 2012 will only run 10.8 or later. 10.8 through 10.11 are supported by these Macs [indicate machine ID found in profiler], and newer models may run some variety of 10.9, 10.10, or 10.11):

• MacBook Pro with Retina EMC 2557 from 2012 and 2013 and later models.
• MacBook Air (2013 or newer) [6,1]
• MacBook Air (Mid 2013 or newer) [6,1]
• Mac mini (Late 2012 or newer) [6,1] - the oldest that can run 10.14 after installing 10.11 or later.
• iMac (Late 2012 or newer) [13,1]
• Mac Pro (Late 2013) [6,1]

These models above are the first models that can be upgraded directly to High Sierra 10.13 without other prior upgrades.

The oldest MacBook Air and iMac that can run Mac OS 10.14 after installing 10.11.

• MacBook Air 5,1

• iMac 12,1

These Macs which are older can also be upgraded to 10.12 by upgrading to 10.7.5 first, and 10.13 by upgrading to 10.8 first:

• MacBook (Late 2009 or newer) 6,1
• MacBook Pro (Mid 2010 or newer) 6,1
• MacBook Air (Late 2010 or newer) 3,1.
• Mac mini (Mid 2010 or newer) 4,1
• iMac (Late 2009 or newer) 10,1
• Mac Pro (Mid 2010 or newer) 5,1

The Macs are compatible with 10.8 and later from prior 10.8's release

• Mac Pro (Early 2008 with AirPort Extreme card, or Mid 2012) [3,1]-[5,1] (Earlier Mac Pros are discussed on the 10.8 upgrade tip).
• MacBook Late 2008 [5,1] to mid 2010 [7,1] with no Pro or Air in the name.
• iMac (Early 2009 to mid-2011) [9,1] to [12,1]
• Mac mini (Mid 2010 to mid 2011) [4,1] to [5.1]
• MacBook Air (Late 2010 to mid-2012 [3,1]-[5,2]
• MacBook Pro Late 2008 [5,1] to Retina 2012 that are not EMC 2557.

Install El Capitan Mac Pro 1.1

July 20, 2011 will only run 10.7 or later. The model IDs (x,x) and EMC that fit this description until June 25, 2012 release of 10.8 (excluding the ones which will run only 10.8 or later earlier mentioned) :

iMac of an EMC of 2496; 13,x and later.

Mac Mini 5,x and later.

Macbook Air 4,x and later.

MacBook 8,x and later (no Pro no Air in the name)

Mac Pro 5,1 with EMC 2629 - the oldest that can be have Mac OS 10.14 installed after installing 10.11 or later, those without that EMC number came with 10.6 and can also be updated to 10.14 the same manner; 6,x and later.

MacBook Pro with EMC 2555, 2563; 9,x and later.

Note all the Macs that can only run 10.7 and later, may be able to run 10.6 Server with Parallels, if you need compatibility with an older operating system:

Beyond this point Macs released during certain date ranges also have a maximum operating system, and/or

minimum retail operating system and system specific operating system requirement (when I say up to 10.9 that includes all incremental updates):

Note: images shown below for retail operating system are those that have no 'Update, Dropin, or OEM' wording on them.

March 15, 2010-July 19, 2011 will only run prebundled 10.6 installer disc, and not retail, but also able to be upgraded to 10.9. Note this tip

if upgrading to 10.7 or later: https://discussions.apple.com/docs/DOC-6271

August 28, 2009-March 14, 2010 will only 10.6 or later up to 10.9. And will at minimum be able to use

10.6.3 retailto install 10.6. Note this tip if upgrading to 10.7 or later: https://discussions.apple.com/docs/DOC-6271

During 2000 to 2009, the serial number also made it easier to identify the Macs, as the 3rd, 4th, and 5th character of the serial number referred to the week

and year of the shipment date. Thus for serial numbers where x can be any letter or number, xxABCxxxxx serial numbers would refer to an A which is the last digit of the year, and BC=week of the year. xx905xxxx is the fifth week of 2009. You can then use Wikipedia to figure out what date the release was, and if it was after a specific retail release of an operating system to determine which pre bundled disc it came with, and which later retail discs the Mac could work with.

December 15, 2008-August 28, 2009 will only run prebundled 10.5 installer disc, and 10.6 retail https://discussions.apple.com/content/attachment/43236040snow.jpg, and if on https://discussions.apple.com/docs/DOC-3761

will also run up to Mac OS X 10.11 if you follow this tip: https://discussions.apple.com/docs/DOC-6271

October 28, 2007 -December 14, 2008 will at minimum be able to use the 10.5.6 retail, and install up to 10.9 if included on https://discussions.apple.com/docs/DOC-3761 if you follow this tip https://discussions.apple.com/docs/DOC-6271

January 10, 2006-October 27, 2007 will at minimum be able to 10.5 retail, and if

on Which 10.5 systems can upgrade to 10.8 or 10.9?or Are there 10.4 systems that can upgrade to 10.8 or 10.9? are

able to run 10.9. Core2Duo and Xeon can upgrade to a minimum of 10.7.5. Otherwise if they only have a CoreDuo, CoreSolo Intel

processor only be able to upgrade to Mac OS X 10.6.8. G5, G4, and G3 processors are not Intel.

Earlier dates are covered on this tip:Can I download my Mac OS upgrade?

Using the dates from the above documents, and the dates according to Wikipedia when specific retail

operating system systems were released, you can find which retail releases were newer than the Macs and the ones immediately older.

El Capitan Auf Mac Pro 1.1 Installieren

i.e.:

An October 24, 2011 Macbook Pro will only run 10.8 retail, and 10.9 retail downloads, but needs an

AppleCare requested 10.7 installer to install 10.7. An exception exists in 10.6 Server, as indicated here:

A pre-October 26, 2007 MacBook Pro will only run the system specific Mac OS X 10.4 installer

that shipped with it, which can be ordered from AppleCare, or newer retail installer versions

of 10.5, 10.6 compatible with its hardware, and 10.7 if it is at least a Core2Duo.

CoreDuo, nor is CoreSolo is not compatible with 10.7.

For PowerPC Macs, Mac OS X 10.4.11 and earlier offer Classic compatibility, and on certain 2003 and earlier Macs dual booting on Mac OS X 10.5 & Mac OS 9:

No Mac may run an older version of Mac OS 9 than was prebundled with it.

A more precise timeline of Mac OS X follows (in U.S. date notation. Links to relevant articles up to 10.7 are included, as 10.7 drops PowerPC applications on Intel):

4/8/2015 10.10.3 (with supplemental on 4/16/2015)

1/27/2015 10.10.2

11/17/2014 10.10.1

10/16/2014 10.10 Yosemite

9/17/2014 10.9.5

6/30/2014 10.9.4

5/15/2014 10.9.3

2/25/2014 10.9.2

10/22/2013 10.9 (10.9 & 10.9.1 should be skipped due to security issues) Mavericks

10/3/2013 10.8.5 supplemental update

9/25/2013 10.8.4 iMac Late 2013

6/10/2013 10.8.4 MacBook Air mid 2013

6/4/2013 10.8.4

3/14/2013 10.8.3

11/29/2012 10.8.2 Mac MIni Late 2012

10/4/2012 10.8.2 supplemental update

10/4/2012 10.7.5 supplemental update

8/23/2012 10.8.1

7/25/2012 10.8 Mountain Lion

5/9/2012 10.7.4

2/1/2012 10.7.3

10/12/2011 10.7.2

8/16/2011 10.7.1

7/25/2011 10.6.8 v1.1

5/4/2011 10.6.7 Early 2011 MacBook Pro

3/21/2011 10.6.7

Installare El Capitan Su Mac Pro 1.1

1/6/2011 10.6.6

11/10/2010 10.6.5

6/15/2010 10.6.4

4/13/2010 10.6.3 v1.1

4/1/2010 10.6.3 retail installer presently sold at the online Apple Store.

8/28/2009 10.6 retail installer (Snow Leopard)

12/15/2008 10.5.6 retail installer (Last PowerPC installer)

6/30/2008 10.5.4 retail installer

Mac Pro 1.1 El Capitan Installer

11/15/2007 10.5.1 retail installer

10/26/2007 10.5 retail installer (Leopard)

8/7/2006 Mac Pro (Intel, first Snow Leopard compatible professional desktop) replaces PowerMac G5 (the last PowerPC Mac and Mac capable of running Classic)

5/16/2006 The MacBook replaces the iBook (the last consumer notebook capable of running Classic)

4/3/2006 10.4.6 retail PowerPC only.

2/28/2006 First Intel Mac Mini (not capable of running Classic, first Mac)

1/10/2006 First Intel iMacs, MacBook Pro replaces Powerbook (first Macs not capable of running Classic, first Mac capable of running Snow Leopard)

10/31/2005 10.4.3 retail PowerPC only.

8/9/2004 10.3.5 retail

12/17/2003 10.3.2 retail Mac os x 10.4 tiger dmg.

12/19/2002 10.2.3

Some hints about operating systems:

- Mac OS X 10.8 or later are required to sync with iOS 9.2 or 9.2.1.

- No PowerPC Mac can run Mac OS X 10.5.8 or higher, or sync with iOS 6 or higher.

Apple Os X El Capitan

- No PowerPC Mac can run Boot Camp

- No Mac can run Classic (side by side Mac OS 9 with Mac OS X without reboot) on the same partition as Mac OS X 10.5 or higher.

- No Intel Mac can run Classic.

Mac Pro 1.1 El Capitan Install Usb

- All Intel Macs can run at least Mac OS X 10.6.8 as long as they are older than Mac OS X 10.7's release.

- PowerPC applications need Mac OS X 10.6.8 or earlier to run on Intel Macs.

- Boot Camp needs Mac OS X 10.5 or later on Intel Macs. Note other virtualization tools are available for Mac OS X 10.4.11 or earlier on Intel Macs.

Os X El Capitan 10.11

- Mac OS X 10.7.3 is needed for the latest Java and minimum iCloud.

Mac Pro 1.1 El Capitan Installieren

- The same minimum system requirements exist for Mac OS X 10.8, 10.9, 10.10, and 10.11.

- 10.6.6 is the minimum for the Mac App Store, and upgrading to 10.7 without erasing the drive you install 10.7 on if the hardware supports it.

Download Os X 10.11 El Capitan

- 10.6.8 is the minimum for 10.8 or later upgrades if the hardware supports it.

- Apple has a 10.6.8 to 10.11 updateon the App Store.

- Some Macs that shipped with 10.6 can install up to 10.12 if they are upgraded to 10.7.5 first.