I am trying to open a unity project but i am receiving a “Fatel Error” in the middle of importing all assets of project by unity. My project is large in size ( about 4.2 GB ) .and I am using unity iOS trial version 3.5 . The error says that system is out of memory but my computer’s RAM is of 5 GB -DDR3 . Is it really a memory problem ? Please guys help me out of this . Thanks in advance 
Unity shows the error :
**Fatal error!**
Could not allocate memory: System out of memory!
Trying to allocate: 67108868B with 32 alignment. MemoryLabel: Texture
Allocation happend at: Line:345 in /Applications/buildAgent/work/14194e8ce88cdf47/Runtime/Graphics/Texture2D.cpp
Memory overview
[ ALLOC_TEMP_THREAD ] used: 32752B | peak: 0B | reserved: 262144B
[ ALLOC_DEFAULT ] used: 69979517B | peak: 170594218B | reserved: 268435456B
[ ALLOC_GFX ] used: 715365977B | peak: 744726105B | reserved: 826277944B
Size | Num Used| Num Free|
32-63 | 1| 1|
64-127 | 11| 0|
128-255 | 1| 0|
256-511 | 3| 0|
512-1023 | 1| 0|
1024-2047 | 4| 0|
2048-4095 | 3| 0|
4096-8191 | 4| 0|
8192-16383 | 2| 0|
16384-32767 | 4| 0|
65536-131071 | 1| 0|
1048576-2097151| 1| 0|
2097152-4194303| 2| 0|
4194304-8388607| 0| 2|
8388608-16777215| 2| 0|
16777216-33554431| 4| 4|
33554432-67108863| 1| 0|
Label | Allocated| Count|Largest Alloc
VertexData | 69364| 10| 29416|
Geometry | 240| 5| 48|
Texture | 715296373| 44| 67108868|
*Total* | 715365977| 59| N/A
[ ALLOC_TYPETREE ] used: 94440B | peak: 1063080B | reserved: 33554432B
[ ALLOC_CACHEOBJECTS ] used: 308240B | peak: 2947650B | reserved: 33554432B
[ ALLOC_PROFILER ] used: 529344B | peak: 529344B | reserved: 16777216B
UnityEditor.AssetDatabase:LoadAssetAtPath(String, Type)
tk2dSpriteCollectionBuilder:RebuildOutOfDate(String[]) (at Assets/TK2DROOT/tk2d/Editor/Sprites/tk2dSpriteCollectionBuilder.cs:130)
tk2dSpriteCollectionTextureWatcher:OnPostprocessAllAssets(String[], String[], String[], String[]) (at Assets/