i want to ask if these specs will be sufficient to run lightroom 5 ?
You should be able to run Lightroom version 5 ,6/CC (if have OSX Mac OS X 10.8 or later)
Please refer System requirements for Photoshop Lightroom for Mac and Windows OS
Thanks but using LR 5 or 6 with 4G RAM will slow down the performance ?
Yes it will run slow.Best is to upgrade your Ram.
As per the Requirements.the recommended Ram is 8Gb(both versions 6 and 5 )
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