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Lenovo ThinkPad T420 with UEFI Only

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1 hour ago, Somez said:

I don't plan on replacing the LCD, so I'm really considering the option to format and install Sierra. Especially that based on the comments almost nobody has reported the freezing issue with High Sierra and we have no clue about what is causing the freezes.

I also have freezing issues. As I changed the processor for another (2nd hand) one I thought it might be the processor or the ram memory. 

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I ran Linux memtest for a whole day. No issues at all! So the T420 should be ok!

Replacing the lcd (for a HD version) is not the problem but I want to be sure that solves all problems.

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Hi,

This is my first post to this forum. I have a Lenovo T420 with i5 and HD3000 1366x768 screen.

I need to run Snow Leopard as I have some Pro Apps that do not work properly in Mountain Lion and later.

I've managed to boot of [url="http://www.insanelymac.com/forum/topic/279450-why-insanelymac-does-not-support-tonymacx86/"]#####[/url] Legacy CD and installed Snow Leopard on the slim expander HD.

I can't get it to boot off the slim expander HD but can boot off the legacy [url="http://www.insanelymac.com/forum/topic/279450-why-insanelymac-does-not-support-tonymacx86/"]#####[/url] CD ( which is connected via USB ).

It would be nice to boot off the HD but I could live with booting off the CD. I ran the post install bits but it still doesn't boot of HD.

My main problem is the display. Its only 1024 x 768. Is they a way to get Snow Leopard to work at 1366x768 and also is it possible

to get the external video port at the side to work as well with Snow Leopard.

Thanks.

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@ASROCK_IIfxThe first OS I put on the T420 was Mountain Lion 10.8. Are there AppleIntelH3000Graphics kexts/drivers in snow leopard? Otherwise you will left wih using the basic video driver for the VESA sizes.

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On 2/26/2018 at 2:54 AM, bleuiko said:

I'm trying to get my T420 running Higher Sierra stable but after being logged in for about 20 minutes (and usually when I'm not actively doing anything), the OS would lock up but my mouse would still be usable; I wouldn't be able to click on anything though. It sometimes turned into the spinning beach ball but would otherwise be non-functional.

 

Anyone else run into a similar issue? I'm not sure how to log the crash if this is indeed a crash but I can post logs if someone could tell me how to record it. Any suggestions?

I have encounter the same issues a few times.

Edited by HunterK

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4 hours ago, HunterK said:

 

I have encounter the same issues a few times.

#MeToo

 

Still searching for a solution.

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7 hours ago, tluck said:

@ASROCK_IIfxThe first OS I put on the T420 was Mountain Lion 10.8. Are there AppleIntelH3000Graphics kexts/drivers in snow leopard? Otherwise you will left wih using the basic video driver for the VESA sizes.

Yes, I have 10.6.8 running on an Apple iMac early 2006 and can see IntelHD kexts in its /S/L/E. 10.6.8 introduced HD3000 capability.

However I just can't get 10.6.8 working on my T420. 10.6.3 installs fine and then I upgrade to using 10.6.8 combo and it won't  boot.

10.11.6 is running fine on my T420 but would love to be able to run Snow Leopard with Intel video.

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25 minutes ago, ASROCK_IIfx said:

Yes, I have 10.6.8 running on an Apple iMac early 2006 and can see IntelHD kexts in its /S/L/E. 10.6.8 introduced HD3000 capability.

However I just can't get 10.6.8 working on my T420. 10.6.3 installs fine and then I upgrade to using 10.6.8 combo and it won't  boot.

10.11.6 is running fine on my T420 but would love to be able to run Snow Leopard with Intel video.

Try MacBook Pro 8.1 or 8.2 also Inject Intel

did you have this patch DSDT ?

https://github.com/RehabMan/Laptop-DSDT-Patch/blob/master/graphics/graphics_HD3K_low.txt

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Just now, ASROCK_IIfx said:

Thanks Chris,

How do I set Pro 8.1. I don't have that patch. How do I add it ?

Create a MacBook Pro 8.2  SMBIOS with Clover configurator 

and patch DSDT with MacIasl

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Hi, the Patch Framebuffer Levels and Replace 4th port with VGA in config.plist work, but it only work when I plug vga on start up or before wake up from sleep. But when I hot plug it when os is still running, the patch does not work and the vga doesn't receive signal

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On 3/16/2018 at 11:36 PM, chris1111 said:

Create a MacBook Pro 8.2  SMBIOS with Clover configurator 

and patch DSDT with MacIasl

Neither of these ran in Snow Leopard.

Do I need to run them on an up to date Mac ?

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On 3/16/2018 at 10:53 PM, SuperReaper said:

Hi, the Patch Framebuffer Levels and Replace 4th port with VGA in config.plist work, but it only work when I plug vga on start up or before wake up from sleep. But when I hot plug it when os is still running, the patch does not work and the vga doesn't receive signal

this is expected since VGA is not an active signal. 

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@poopsnaggle make sure that AppleCPUPM is ticked under kext and patches under clover bootloader.. Otherwise, you'd have to make sure NullCPUPowerManagement kext is inside your installer EFI/Clover/kext/other folder..

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6 hours ago, Blaggah said:

@poopsnaggle make sure that AppleCPUPM is ticked under kext and patches under clover bootloader.. Otherwise, you'd have to make sure NullCPUPowerManagement kext is inside your installer EFI/Clover/kext/other folder..

Its working now. Thank you so much!

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On 3/16/2018 at 11:36 PM, chris1111 said:

Create a MacBook Pro 8.2  SMBIOS with Clover configurator 

and patch DSDT with MacIasl

Neither of these ran in Snow Leopard.

Do I need to run them on an up to date Mac ?

 

part way through the 10.6.8 update the system panicked. On reboot I get the following screens.

 

Any ideas ?

part1.jpg

2018-03-18-1492.jpg

2018-03-18-1491.jpg

2018-03-18-1490.jpg

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hmm. seems like you are using Chameleon? i see references to loading of config and kexts from /Extra ???

otherwise, maybe you could copy the already installed snow leopard from your real mac to a HD partition for your T420 system?

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Hi tluck,

I'm going to try a different tack. First of all my current drive that has El Capitan on is only a 64Gig SSD which works fine but I have a spare 250 Gig spinning disk and have partitioned that in to two halves. I want to put El Capitan on one half and get that up and running. El Capitan has been running fine so I will use that again. Thing is Insanelymac seems to have changed over the last week or so and I can't find your original pages for putting El Cap on to a T420. Your latter posts refer to packages that are for Sierra or High Sierra. Please could you point me to the post for El Cap on T420 as I can't seem to find it. Once I've got El Cap running on the larger drive I might try and put Snow Leopard on the other half. My T420 is i5 and HD3000 1366x768 , also has broadband 3G module. Not sure if I'd ever get that working under OSX.

Thanks.

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El Cap zip https://www.insanelymac.com/forum/applications/core/interface/file/attachment.php?id=240230

Sierra works quite well too. (current zip supports it). High Sierra is doing great on one of  my T420 systems - the one that has an LG display vs not-very-good-at-all AUO display. 

 

 

Edited by tluck

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1 hour ago, tluck said:

El Cap zip https://www.insanelymac.com/forum/applications/core/interface/file/attachment.php?id=240230

Sierra works quite well too. (current zip supports it). High Sierra is doing great on one of  my T420 systems - the one that has an LG display vs not-very-good-at-all AUO display. 

Thanks for the zip.

Please could you direct me to the instructions page as I can no longer find it.

My old bookmarks go up to page 201 for this topic but now it only seems to have 162 pages since insanelymac

changed a week or so ago :-(

 

 

 

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Thanks tluck.

I'll try and install ElCap on one partition and get it all working, then try Snow Leopard on the other.

BTW can't get my avatar photo on side ( only at bottom )

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